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Hmm.

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SBU CFNS: So i'm gonna say something to everyone knows, and they're gonna show some result results or updates, whether experiments that maybe not. Everyone here is aware of.

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SBU CFNS: so I think a lot of us keep pretty well addressed in it.

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SBU CFNS: So

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There we go.

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It was in one question.

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SBU CFNS: You killed me on

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SBU CFNS: arrow.

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SBU CFNS: Yeah, that is.

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SBU CFNS: you're thick. Okay? So in the Times in the past. But I've given this talk. I've shown this lovely slide. Give or take. With the the gist of here are 3 different anomalies. Here's the Ne. On G minus 2 discrepancy.

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SBU CFNS: here's this X 17, which

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SBU CFNS: I think everyone knows about. And here are king plots which is saying that

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SBU CFNS: Adams behave as if there's some

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SBU CFNS: extra coupling to the nucleus.

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SBU CFNS: and all these things could be resolved with a new interaction.

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SBU CFNS: And then we go back to this kind of naive world where we say

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SBU CFNS: it's just some new field that couples to the photon

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SBU CFNS: through some sort of heavy loop.

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SBU CFNS: and then, when you

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SBU CFNS: do the math on this, it

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SBU CFNS: inherits then

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SBU CFNS: small couplings to electric charge. This is kineticics

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SBU CFNS: this? We we already know. That's not gonna work out. But in general that's an a cute way to motivate this. And then, of course, in general. You can always just write any term that that doesn't break the lagrangian so you could throw these things in there anyway.

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SBU CFNS: and this gives you a new force that is parameterized by

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SBU CFNS: couplings that may or may not be depended upon. The flavor of the thing it's coupling to, and the mass of the the force carrier.

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SBU CFNS: And then, you know, in a typical 10 min talk, I would go on to point out that there's a lot of interest in this, and people have already looked.

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SBU CFNS: and you can see all these

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SBU CFNS: hold on to the bottom.

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SBU CFNS: hi! Video panel.

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There you go

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SBU CFNS: so many experiments. I search for this

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SBU CFNS: kinetic mixing basic model, and it already completely rules out the anomalies that with motivated.

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SBU CFNS: However, you know, if you're still there. So you say, okay, maybe there's a more complex model like this plate, or whatever dependent coupling, and it turns out that there are some paths through flavor space where the coupling to the down work and the up quark match up enough to push the existing hydronic limits out of the way.

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SBU CFNS: And this is what call yeah. So-called Protophobic the force.

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SBU CFNS: And once you do that, you get something that looks like this for those of you who've been staring at this sort of plot a lot you'll know this one has an extra red line here

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SBU CFNS: which I've gotten around to making for the updated G minus 2, including the result.

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SBU CFNS: So

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SBU CFNS: if you take just the new result, this thing moves down. If you average the Premier League result on the propating result, they say, or less in the middle. I mean, this is in the middle, on a log plot, so it is moving down.

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SBU CFNS: but it's hard to see.

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SBU CFNS: so the just is. if you really want to find this thing you can't use.

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SBU CFNS: Hadrons. You need to use a purely electronic production mode. And of course that's us. And you can do this at low energy, which yawn, and everybody has pointed out.

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SBU CFNS: And this is I. This is my last slide of

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SBU CFNS: Yeah, it's moving down.

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SBU CFNS: the width is not the open

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SBU CFNS: I agree with the green line. Yeah, the green. The green band was the old one, the red line, or inside the band on both sides.

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SBU CFNS: All right. That that was managed to be erased. So you'll forgive me.

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SBU CFNS: Yeah.

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SBU CFNS: So the upper limit comes down

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SBU CFNS: because we we can't tolerate as large a

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SBU CFNS: thing in the error. Bars go down so it it

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SBU CFNS: it doesn't

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SBU CFNS: drop to 0.

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SBU CFNS: It's it's centered in a log one.

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SBU CFNS: so it's not really centered

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SBU CFNS: it. It should be enough, because you know this, this is not the center of a lot of clock.

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SBU CFNS: and if you don't, maybe

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SBU CFNS: we can. We can talk more about whether that's the right way to image this. But alright, we'll get to that later.

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SBU CFNS: you are here.

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SBU CFNS: just a quick Raise your hand if you like. A refresher of what we are doing with our experiment.

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SBU CFNS: Okay, we're trying to.

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SBU CFNS: I'm going to go very quickly. We'll come back to this. Please feel free to ask the question.

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SBU CFNS: We are taking a low energy electron beam we are impinging on a tantalum target to to produce this a prime in the final state and the a time then subsequently the case we need plus and minus.

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SBU CFNS: and

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SBU CFNS: this is our red box is our signal, where you can produce it in the initial or final state, and we tend to produce it here.

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SBU CFNS: these are the center model backgrounds where you just replace the a prime with the photon, and you get one more term here where you this try and thing it's not actually

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SBU CFNS: photon carrying the plus and minus.

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SBU CFNS: And it turns out for us where we're working on our

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SBU CFNS: instantaneous luminosity.

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SBU CFNS: We are

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SBU CFNS: dominated by the quadratic background where you pick up.

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SBU CFNS: They positron

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SBU CFNS: from a center model process and an electron from a radiated standard model process. So this

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SBU CFNS: this stuff

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SBU CFNS: combinatorically dominates.

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SBU CFNS: And then at that point there's no reason to turn up the beam to higher intensity, because, you know, this goes like luminosity for

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SBU CFNS: okay.

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SBU CFNS: moving on. So what's new in those anomalies? We have 3 anomalies that I showed on the first slide, and there's something new in each of them

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SBU CFNS: the first we're going to start with the this is in different order.

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SBU CFNS: but we're going to start with the X 17

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SBU CFNS: the group has seen this anomaly and brilliant and helium 4, and now they've also seen it in carbon, 12, and it persists in the original 5 fold, and the new 6 full detector geometry

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SBU CFNS: It's very incompatible with this simple, connected mixing model. That's where the photo came from is how do you make this very glaring.

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SBU CFNS: invariant mass peak

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SBU CFNS: jive with the fact that if it's this big it should be in basically every they can reach that mess.

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SBU CFNS: And yeah protocol where I talked about it

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SBU CFNS: a little bit more about this. the idea! Here is you create. These excited states that have very high energy to the Ground state.

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SBU CFNS: and usually they just it's integrated in some fashion, but occasionally these will the excite through a photon or eternal pair creation.

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SBU CFNS: and you can look at the E plus the minus pairs, construct their structure in terms of their energy, asymmetries and their opening angles. And you see

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SBU CFNS: resident structures

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SBU CFNS: when there is a symmetric energy.

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SBU CFNS: so that you plus to the minus of sharing your energy roughly, equally, and then you see no resonance if they are very asymmetric, and this is consistent with a heavy bose, a heavy intermediate state.

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SBU CFNS: and then they they kindly recast this in terms of things that we're more familiar with, which is the invariant mass shape, and you can see the expected background is more or less flat, and you have a bump that's

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SBU CFNS: more or less the traditional way that you seek a rare

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SBU CFNS: production.

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SBU CFNS: As I said, we've seen it in 5, 6 full detectors. So this is the original detector geometry on the left, the a.

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SBU CFNS: Our a here fivefold, and here in part B 6 full. So if we were a geometric back in the detector, you might expect that it would go away

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SBU CFNS: or move around a lot when you move to a different geometry, and it doesn't

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SBU CFNS: and now they've seen it 3 different nuclei. This is, unfortunately, this is from their recent paper, but not labeled well. But this includes, the hubium and the beryllium, and then these 4 are different energies for the carbon.

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SBU CFNS: It could be center model. It could be nuclear effects, intermediate States interference. Some of the novels form factor. These are not us

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SBU CFNS: perfectly satisfying to talk more about that. But there's no clear

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SBU CFNS: answer that resolves all this. Yeah, we'll wait for the theorists on that one. In the meantime

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SBU CFNS: we should continue on it.

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that is so away.

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SBU CFNS: Yeah, I don't think you know the answer to this question. But i'm i'm be reading the thing in the paper.

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right? We guys

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SBU CFNS: that that nicely written paper. But they explicitly talk about

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SBU CFNS: looking for this to seek. Well, right, and the bank paper came out before they had the idea of doing perfect 12, right? So where they directly guided by. So I know that they talk about the branching ratios here matching the prediction, which is.

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SBU CFNS: is me.

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SBU CFNS: You know it it especially since the branching ratios don't match their previous

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SBU CFNS: Yeah, I think either it's a great indication. Here's the problem. It is suspicious, but it's also what You' to

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SBU CFNS: right.

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SBU CFNS: so I I guess my my point was that if you said there was. No. You read this description, but I think it's it's it's really satisfying standard model thing that that encapsulates all these. It says, okay, there's no new part of this here. It's just nuclear effects. I mean.

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SBU CFNS: we've seen a couple of papers. I don't have them linked here, but there are a couple of papers that catch pieces of this like. Well, you can make it this way. You can't make it that way, but they're not

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SBU CFNS: properly constrained to my eyes.

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SBU CFNS: basically.

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SBU CFNS: I think the current 12 rules.

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SBU CFNS: It is consistent with a a vector

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SBU CFNS: and not the scalar.

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SBU CFNS: and that's

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SBU CFNS: you can. Maybe you can check on that I don't even need faster. Yes, if you play it

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one.

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SBU CFNS: why would the 2 Mev

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alright, i'm lower

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SBU CFNS: statistics because they didn't run as long so No, it seems like me I shoot. I might have it in the back side, but it kind of

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SBU CFNS: they. They. They have 5 settings, and it kind of seems to wander out of their window.

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SBU CFNS: So the port setting is already starting, getting kind of weak. And then the this setting

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SBU CFNS: the the reason they scanned these energies on the on, the the 2 middle one. So one of the

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SBU CFNS: so they they scan the energies because it's energy loss in their target. So they want to try to

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SBU CFNS: move.

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SBU CFNS: You know what region that they're they're on the residence for, can we the target in some fashion? But it also has other losses.

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SBU CFNS: But yeah, you can point out that yeah suspiciously. One of their 5 energy settings disappeared between the opening of their paper and the closing of their paper, and it's not shown here. They they just make the same, and then they also measure 2.5, and you'd be proton team energy. And then

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SBU CFNS: so it it is.

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SBU CFNS: Yeah, I i'm not gonna pass that I.

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SBU CFNS: The right thing to do is for someone other than the a group to look at this.

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SBU CFNS: but they have to get to the

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3 in the paper.

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SBU CFNS: all right.

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SBU CFNS: for now.

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SBU CFNS: and I i'm not an atomic physicist. So I apologize. I am going to be kind of reading about this.

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SBU CFNS: The idea of the king plots is that

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SBU CFNS: if you look at the ratios of different transitions in different related isotopes. You can cancel out a bunch of things and expose nuclear effects.

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SBU CFNS: and if he's

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SBU CFNS: nuclear facts are too large or unexpected by by theory, then they might be

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SBU CFNS: new physics.

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SBU CFNS: And

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SBU CFNS: previously we had this blue band, this blue band over here on the right hand plot.

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SBU CFNS: which says that to be consistent with the I'm. Trying very slowly

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SBU CFNS: with these ratios.

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SBU CFNS: we prefer a

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SBU CFNS: mass and coupling that goes like that blue band.

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SBU CFNS: We are living above the hundreds of Kv range. So we're on this nice, consistent thing without all the resonance structures.

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SBU CFNS: However, there have been some new results. When you add in these new results.

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SBU CFNS: They are the gray van which is the the new ones. Pull down the overall.

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SBU CFNS: significance. If you want a massive. You know Mev. Plus.

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SBU CFNS: course, Here, if you're down to this resident region.

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SBU CFNS: you also have some some spaces where you can tolerate anything, and then between them

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SBU CFNS: you can. So if it's in here, it still has to be non-zero mass. But here we're

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SBU CFNS: we can tolerate, and need that prefer

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SBU CFNS: something quite close to the original line. But now the error Mars is going up.

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SBU CFNS: and

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SBU CFNS: the best I understand again, not because it says

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SBU CFNS: they they produce this

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SBU CFNS: 2D plot. Here it is

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SBU CFNS: 2 different ways of combining 4 different isotope shift

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SBU CFNS: ratios.

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SBU CFNS: and they say, okay, if it's in the pink direction, it's a nuclear deformation or a nuclear deformation like in terms of the

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SBU CFNS: Not only are you in the king.

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SBU CFNS: if it's in the green direction, it's typical of a new physics, and if it's in the blue direction, it's typical of a quadratic

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SBU CFNS: field shift, and I actually don't know what that is.

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SBU CFNS: But the green direction is the one that's exciting. And when they added in this new piece here, it really makes the 3 different results. These 3 purple dots

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SBU CFNS: lined up more with the nuclear deformation world than they did before.

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SBU CFNS: So I mean there, there, there's 3 axes in 2 dimensions, so there's multiple interpretations. But it's now consistent

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SBU CFNS: with an interpretation of standard model physics.

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SBU CFNS: The last one formula of G minus 2 real quick

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SBU CFNS: i'm

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SBU CFNS: the anomalous magnetic moment, picks up all these terms from non-leading order effects

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SBU CFNS: it doesn't match up with the measurement

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SBU CFNS: the theory in the measurement to match up.

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SBU CFNS: and that could mean that there is a term missing from these sums with, you know, a new force, and

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SBU CFNS: that'd be great

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SBU CFNS: something just to throw in here

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SBU CFNS: that big discrepancy between theory and experiment is driven by the choice that the G. My 2 group and the Pdg. Makes

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SBU CFNS: that the

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SBU CFNS: calculations for the hydraulic contributions

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SBU CFNS: to

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SBU CFNS: G minus 2 should be taken from the data driven

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SBU CFNS: approaches, and should not include the lattice. Qcd. Approaches these bottom to here.

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SBU CFNS: which produce a much larger term there. So if you believe these, the discrepancy would actually be much smaller.

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SBU CFNS: And this is where this line comes from. If you combine Fermi Lab and Brookhaven, which notably they use the same device. So it's possible to have some correlated uncertainties, maybe not

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SBU CFNS: the lining. The group did an excellent work, but

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SBU CFNS: it is that the last the same device in the same way the top gate machine is the same device in the same group

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SBU CFNS: also. So when you combine the 2 of them, you just tend to straight. The error bars in a way that looks incredibly symmetric on the log plot.

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SBU CFNS: So i'll note that if there's some truth to the lattice Qcd. Increases in the electronic terms that would tend to decrease the G minus 2 preferred band, and it down in space

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SBU CFNS: into an interesting region for us again.

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SBU CFNS: All right.

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SBU CFNS: So that's what's new an anomaly what's new in searches I got. This is actually a hijacked slide talk. I gave a year and a half ago in the beginning of 21,

196
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SBU CFNS: and I just updated it a lot of these things where people have the intention, but they don't know how to do it yet. And in the past 18 months people have really

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SBU CFNS: move forward. So, lot of things a apex and Hps as best I can tell. They probably can't reach, and they haven't changed that position.

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SBU CFNS: But Padmay had said, we don't have a good idea of how to do this, and now they have kind of like had a good idea. They've done it so their experiment is ready to take this data

199
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SBU CFNS: and a 64 had said it was challenging. And now they've made those changes. So they too can do. It.

200
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SBU CFNS: we had heard in the beginning of 2,021, that Montreal was going to try to announce a really in experiment and now

201
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SBU CFNS: they have that device.

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SBU CFNS: and Lhcb. Which was really terrifying and promising to have even some of the base space by now is now saying end of one. So the dark focus on specific folks. They've sped up, and some of these general purpose accelerators have discovered.

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SBU CFNS: Although their reach is still

204
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SBU CFNS: huge.

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SBU CFNS: they are not

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SBU CFNS: not as quick as we. You might be

207
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SBU CFNS: all right.

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SBU CFNS: The Montreal Chamber. They I wish they would name this detector this experiment, because.

209
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SBU CFNS: yeah, you know, Montreal. And then you look for like x 17 or tunnel views. same sort of deal. They're shining a proton beam on a lithium fluoride target.

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SBU CFNS: however, we're a to he has a very limited coverage. This thing has 95% solid angle.

211
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SBU CFNS: so they you expecting when they run this thing to get 9 X 17 per hour.

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SBU CFNS: which is pretty cool, and in a couple of weeks they will have a pretty substantial thing.

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SBU CFNS: That's the old

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Yeah.

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SBU CFNS: I don't remember exactly what parts of them. But yeah, I know it's so hard to

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not very

217
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SBU CFNS: so this is using the

218
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SBU CFNS: I

219
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SBU CFNS: i'm not.

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It's okay. This

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SBU CFNS: right?

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SBU CFNS: Alright, so using the parameters that came from the Tom Key group. These are the spectrum they expect. So you'll see a pretty substantial bump in a couple of weeks of running.

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SBU CFNS: and they're expected to do that

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2020.

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SBU CFNS: And this is actually taken from an excellent paper that was submitted to a proceedings for a recent workshop that took place in Canada somewhere.

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SBU CFNS: It sounds really nice. It's really well organized. I just get that feeling

227
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SBU CFNS: okay

228
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SBU CFNS: moving on now.

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SBU CFNS: They have made further advances now that they can get their e plus the United States even more cleanly than they thought they could.

230
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SBU CFNS: so that this the shape of their

231
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SBU CFNS: It's gonna do it.

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Oh.

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SBU CFNS: the shape of their coverage region has actually grown. It's a little hard to tell, but

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SBU CFNS: it used to be less expansive here as you go to higher energies, that doesn't really bother us much. What what scary is the fact that it really covers what's called Months gap here, or the jaws of this thing.

235
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SBU CFNS: However, the way this grows is, it grows in a little patch out here. You can see it. This will grow down to lower mass.

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SBU CFNS: and then it expands up and down

237
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SBU CFNS: from there. So it doesn't doesn't really get into really the sweet spot over here until it has a lot of these things, so they do need a lot of physics to do that.

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SBU CFNS: That, said

239
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SBU CFNS: they.

240
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SBU CFNS: Yeah, yeah, this these are displaced vertices, this. This island down here is just place vertices, and these are direct measurements. So they they close from from both sides.

241
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SBU CFNS: Yeah, this all the solid line is what they expect to cover

242
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SBU CFNS: at the

243
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SBU CFNS: what?

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SBU CFNS: I'm sorry did the things lagging somebody. Yes, this place of projects from inside of and from top. So so this one this will blows up in here, and this one comes down from the computer phone call. Yeah.

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SBU CFNS: So all the all the color blue on this plot that's their existing exclusion. So they've they've proved those they can rule those regions out that's existing now. Yes, there's some of the

246
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SBU CFNS: but that also gives you an idea of how this is going to grow with more data. It's not like it's going to suddenly be right here. That's the hearts it which, exactly between those 2 islands is where it's hard to get.

247
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This is in Gdp.

248
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SBU CFNS: yeah.

249
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SBU CFNS: 26.

250
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SBU CFNS: I I I will throw a a shout out to

251
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SBU CFNS: who has a nice way to to.

252
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SBU CFNS: Oh, that's right.

253
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SBU CFNS: I don't have a I don't have a modified what's going to happen with the energy

254
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SBU CFNS: i'm sorry here, but also it

255
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Yeah.

256
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But

257
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SBU CFNS: okay, so they're using this Francis side over nuclear. It's my sign of like this: They're setting that to the people.

258
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SBU CFNS: and the very least out of respect for people who can't afford to eat their own.

259
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Okay.

260
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I'll see that.

261
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SBU CFNS: So

262
00:23:40.090 --> 00:23:41.030
SBU CFNS: yeah.

263
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SBU CFNS: in kind of more more frightening news bell to

264
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SBU CFNS: They these are their updated exclusions.

265
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SBU CFNS: Well, the so on line here is what they expect to get with 200 and perceptive bar, and then 50 inverse out of bars, which is their full design luminosity.

266
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SBU CFNS: and this 200 inverse tempter, barn coverage.

267
00:24:06.010 --> 00:24:16.960
SBU CFNS: covers a lot of the remaining X 17, and they have it on tape already, or on this already. They haven't analyzed it. Haven't published it. But it's sitting there.

268
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SBU CFNS: So that's

269
00:24:18.070 --> 00:24:19.679
SBU CFNS: a little inferiorating.

270
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SBU CFNS: I I don't know if they're gonna try to publish an interim thing or not

271
00:24:25.840 --> 00:24:29.469
SBU CFNS: it's a displaced vertex, but it has very different kinematics.

272
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SBU CFNS: and

273
00:24:34.330 --> 00:24:36.950
SBU CFNS: which is really forward.

274
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Alright, this is Jenny.

275
00:24:50.510 --> 00:24:52.939
I i'll have to talk to Chris for any of

276
00:24:55.580 --> 00:24:56.230
yeah.

277
00:24:58.000 --> 00:24:59.330
yeah.

278
00:24:59.660 --> 00:25:00.430
he's doing 11

279
00:25:00.480 --> 00:25:01.070
about you.

280
00:25:04.840 --> 00:25:07.100
SBU CFNS: magic

281
00:25:07.150 --> 00:25:12.459
SBU CFNS: is slit from 23 to 24 for the when they try to get it first.

282
00:25:12.540 --> 00:25:16.169
SBU CFNS: So this this is one that that is really well positioned

283
00:25:16.200 --> 00:25:18.640
SBU CFNS: if you know the

284
00:25:18.680 --> 00:25:19.450
oh

285
00:25:19.600 --> 00:25:24.729
SBU CFNS: real data, and it won't for a little while. But it's well positioned. It's. It's segregated there.

286
00:25:25.230 --> 00:25:29.609
SBU CFNS: It's very conceptually similar to us, though it has a gas target.

287
00:25:35.100 --> 00:25:38.579
SBU CFNS: But in any case they're accelerating on my hand

288
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so

289
00:25:41.820 --> 00:25:42.580
SBU CFNS: well.

290
00:25:45.550 --> 00:25:55.359
SBU CFNS: which we you told them more than once.

291
00:25:55.440 --> 00:25:57.400
SBU CFNS: So so the

292
00:25:59.960 --> 00:26:01.890
the

293
00:26:09.690 --> 00:26:10.999
external.

294
00:26:11.030 --> 00:26:15.710
which makes this

295
00:26:16.540 --> 00:26:19.280
SBU CFNS: so

296
00:26:23.240 --> 00:26:29.010
SBU CFNS: I think they will have the same.

297
00:26:32.750 --> 00:26:33.640
I almost.

298
00:26:34.030 --> 00:26:34.630
Yeah.

299
00:26:35.870 --> 00:26:41.719
SBU CFNS: so it's also there they're the line. So they just want to. There for a long time they they have less companies supported.

300
00:26:42.460 --> 00:26:43.970
It's it's a money problem.

301
00:26:50.350 --> 00:26:54.830
SBU CFNS: it's not

302
00:26:55.030 --> 00:26:55.680
this.

303
00:26:58.420 --> 00:27:05.760
SBU CFNS: So this I don't think this is a

304
00:27:08.790 --> 00:27:11.260
SBU CFNS: we? Then basically maybe 5 people.

305
00:27:14.820 --> 00:27:16.370
Yeah.

306
00:27:17.590 --> 00:27:18.500
and

307
00:27:23.270 --> 00:27:26.050
I think they have to.

308
00:27:28.230 --> 00:27:32.349
SBU CFNS: I don't think so. I

309
00:27:32.680 --> 00:27:33.350
bye.

310
00:27:33.710 --> 00:27:35.629
SBU CFNS: either way they're sold on the plane

311
00:27:38.630 --> 00:27:40.010
SBU CFNS: l of X.

312
00:27:40.910 --> 00:27:45.290
SBU CFNS: They this is actually 2 slides here. I'm just wondering why I don't have their their bots.

313
00:27:45.580 --> 00:27:52.449
SBU CFNS: so they they're designed to do it visible. But they've found some ways to do visible decays since last time we spoke to them.

314
00:27:52.730 --> 00:27:53.730
SBU CFNS: and

315
00:27:54.630 --> 00:27:56.690
SBU CFNS: this is their new updated result.

316
00:27:56.840 --> 00:27:58.170
SBU CFNS: So it is

317
00:27:58.340 --> 00:28:03.820
SBU CFNS: displaced vertices, but they're probably not going to be able to. This is the red Here.

318
00:28:05.050 --> 00:28:10.590
SBU CFNS: there's 2 different energy settings, and they don't actually tell you which one's which. But either way they don't quite close the gap.

319
00:28:10.760 --> 00:28:12.370
Yes.

320
00:28:16.420 --> 00:28:17.100
okay.

321
00:28:17.890 --> 00:28:24.640
SBU CFNS: The best I can see. They can do this without My! So this this this one's visible and invisible at the same time.

322
00:28:26.360 --> 00:28:32.689
SBU CFNS: and they could also do a lot of model dependent. Other searches that actually got you. But the whole point is to try to do this.

323
00:28:33.000 --> 00:28:35.590
SBU CFNS: only looking at the electronic coupling as far as I can.

324
00:28:37.180 --> 00:28:44.100
SBU CFNS: All right. Yeah. And you know they They're not going to start until 2,025. It's taken several years to to build up these curves.

325
00:28:44.150 --> 00:28:47.710
SBU CFNS: So it's an interesting region to cover it's not

326
00:28:47.920 --> 00:28:51.989
SBU CFNS: not everyone can get there, but that's not where we want to be. So

327
00:28:52.240 --> 00:28:53.850
SBU CFNS: I wish them all the best.

328
00:28:54.080 --> 00:29:02.289
SBU CFNS: Oh, that's the They're invisible, which is what they're designed to do. Okay, and it's it's a little weird to me.

329
00:29:02.690 --> 00:29:05.100
SBU CFNS: Because yeah, this region's

330
00:29:05.350 --> 00:29:24.409
SBU CFNS: on this plot doesn't look very exciting. I'm not sure Why, they're going to do that.

331
00:29:24.600 --> 00:29:27.399
SBU CFNS: I I guess they're trying to show the complementary coverage.

332
00:29:27.700 --> 00:29:32.669
SBU CFNS: Yeah, either way go, Look at the

333
00:29:32.730 --> 00:29:34.249
they needed them accelerated.

334
00:29:34.730 --> 00:29:35.869
SBU CFNS: It's a slack now.

335
00:29:42.380 --> 00:29:43.839
I didn't mute.

336
00:29:45.390 --> 00:29:48.080
SBU CFNS: They're talking about 74 to 25

337
00:29:48.360 --> 00:29:49.550
SBU CFNS: so

338
00:29:52.750 --> 00:29:53.859
put it in a button.

339
00:29:54.080 --> 00:29:56.120
SBU CFNS: Yeah, so I I thought

340
00:29:56.150 --> 00:29:57.919
SBU CFNS: so. I I know the

341
00:30:00.500 --> 00:30:08.469
SBU CFNS: Andrew is getting right now.

342
00:30:08.540 --> 00:30:13.450
SBU CFNS: and they they have it's a it's a parasitic off the

343
00:30:13.660 --> 00:30:15.920
the

344
00:30:16.150 --> 00:30:18.600
SBU CFNS: so there might be some decline that needs to be

345
00:30:18.790 --> 00:30:22.859
SBU CFNS: no to actually type it over there. But it's

346
00:30:24.490 --> 00:30:26.840
SBU CFNS: all right either way.

347
00:30:27.230 --> 00:30:32.619
SBU CFNS: It's a it's a neat design. It's kind of neat to see them figuring out how to make it visible. Search the visible search

348
00:30:33.130 --> 00:30:35.769
SBU CFNS: but it's gonna take a while to do it

349
00:30:36.450 --> 00:30:37.990
SBU CFNS: n a 64

350
00:30:39.990 --> 00:30:46.580
SBU CFNS: They previously said that it was going to be very challenging to to close the gap any further than they already have. They done a great job.

351
00:30:46.850 --> 00:30:50.789
SBU CFNS: And what they needed to do was basically build a different protector

352
00:30:50.880 --> 00:30:52.670
SBU CFNS: because they make this

353
00:30:52.700 --> 00:30:56.299
SBU CFNS: to to get any higher. In this they have to get a shorter

354
00:30:56.320 --> 00:31:02.959
SBU CFNS: that to be able to see shorter displaced vertices, which means they have to take their toing calorimetry, which is here.

355
00:31:02.990 --> 00:31:04.429
SBU CFNS: and they can shorter.

356
00:31:04.520 --> 00:31:11.519
SBU CFNS: and they have to add in some other detectors, and it was considered a very challenging thing. Which they have done

357
00:31:11.560 --> 00:31:16.099
SBU CFNS: so they're planning to do that next year as a report a couple of months ago.

358
00:31:16.170 --> 00:31:18.550
SBU CFNS: and it seems very possible that they will do so.

359
00:31:20.570 --> 00:31:28.749
SBU CFNS: don't have a exact plot of how hard I think they're going to get with that. But they they say that they can close close this gap around the really late

360
00:31:29.690 --> 00:31:30.590
SBU CFNS: that's the same.

361
00:31:31.120 --> 00:31:34.739
SBU CFNS: and this will be a final state. So I think that that does.

362
00:31:35.280 --> 00:31:36.430
Yeah.

363
00:31:36.680 --> 00:31:38.210
Okay, in the same region we're looking.

364
00:31:40.430 --> 00:31:46.559
SBU CFNS: I I mean, i'm, by the way impressed that they went from saying, we have to redesign the whole detector to.

365
00:31:46.620 --> 00:31:52.380
SBU CFNS: We did that.

366
00:31:55.940 --> 00:31:58.620
Yes, this is

367
00:31:58.750 --> 00:32:03.650
SBU CFNS: okay. So this these are

368
00:32:03.670 --> 00:32:21.570
SBU CFNS: displace vertices. These are rate limitations. So it's through the If you want to go up. If you want to go up

369
00:32:21.650 --> 00:32:27.680
SBU CFNS: a fine, it's from from where it's created, or you need to increase your resolution, be able to fl that.

370
00:32:28.640 --> 00:32:33.380
SBU CFNS: and that that's what they're doing. Is there

371
00:32:47.990 --> 00:32:49.950
SBU CFNS: The boost of the a prime is very different than the 2.

372
00:32:54.370 --> 00:32:56.059
So

373
00:32:56.130 --> 00:32:57.850
yeah.

374
00:32:57.890 --> 00:33:01.359
SBU CFNS: you can kind of get that impression from the fact that this looks like the rectangle.

375
00:33:01.510 --> 00:33:03.620
SBU CFNS: and this one most like

376
00:33:03.990 --> 00:33:05.230
this is getting

377
00:33:07.870 --> 00:33:26.059
SBU CFNS: last one, padm, they said, extremely challenging. they also figured out how to do it. Padm, They started out as a positron. It it still is a pause from being looking for missing energy, but they, too, decided they needed to retool Cbx 17. They built a new electron tag

378
00:33:26.070 --> 00:33:28.650
SBU CFNS: detector, so I can look for charged particles

379
00:33:29.930 --> 00:33:33.650
SBU CFNS: and they have started. Run 3,

380
00:33:33.970 --> 00:33:34.930
SBU CFNS: apparently.

381
00:33:35.270 --> 00:33:36.880
SBU CFNS: they say they have

382
00:33:36.900 --> 00:33:46.099
SBU CFNS: dedicated to scanning this X 17 range. There's 2 plots here showing what they think they can reach. In quote unquote a few weeks of data

383
00:33:46.380 --> 00:33:53.409
SBU CFNS: which is shocking to me, so we'll see if they can actually pan that out. They have 2 2 different approaches

384
00:33:53.700 --> 00:33:58.330
SBU CFNS: it's basically you can see the teeth on it. Maybe if you look closely, there's deep there.

385
00:33:58.480 --> 00:34:09.399
SBU CFNS: and the the wide one is the conservative approach that cancel a larger range, but they also have an opportunity to do it in a smaller steps right around the peak.

386
00:34:09.480 --> 00:34:17.939
SBU CFNS: and because it's sweeping in such small steps, they kind of self analyze the background, and you're just looking for where it really has a bump on it.

387
00:34:18.010 --> 00:34:20.290
SBU CFNS: So if that works out, if they really

388
00:34:20.719 --> 00:34:32.789
SBU CFNS: can control the system, actually, they say they can, then this could be really effective if they're willing also to dedicate themselves to just the core of the X 17, we'll see what they are doing.

389
00:34:33.520 --> 00:34:37.950
SBU CFNS: And of course, that's in this the the it's been one case. If it's been 0

390
00:34:38.290 --> 00:34:42.399
SBU CFNS: there's a lot more faces

391
00:34:42.929 --> 00:34:48.040
is I mean

392
00:34:50.380 --> 00:34:51.880
nobody.

393
00:34:52.030 --> 00:35:09.880
SBU CFNS: Yeah, they're they're they're they're they're They're ending for the X 17. And the question is, how how we that 17 in the it's, you know. Yeah, you're right that if they were more serious about this. They probably should have sent it out, really. But yeah.

394
00:35:10.780 --> 00:35:12.879
SBU CFNS: I

395
00:35:13.840 --> 00:35:19.210
SBU CFNS: well, that would be

396
00:35:24.920 --> 00:35:27.969
SBU CFNS: yeah. They They

397
00:35:28.040 --> 00:35:36.870
SBU CFNS: They they make some optimistic. I know they make some optimistic assumptions about how well the e tech they're just gonna work on their other backgrounds that they're gonna

398
00:35:38.180 --> 00:35:46.040
SBU CFNS: so they have to. They need to avoid your hotel conversions, or they charge part of all the they they boot call.

399
00:35:46.400 --> 00:35:47.970
But

400
00:35:49.110 --> 00:35:53.539
SBU CFNS: I don't know what other packets. So that's why I put it. This

401
00:35:58.800 --> 00:36:02.340
SBU CFNS: electrons are hard

402
00:36:02.980 --> 00:36:04.390
SBU CFNS: or they so we'll.

403
00:36:04.670 --> 00:36:05.689
But you know

404
00:36:05.910 --> 00:36:07.549
SBU CFNS: I i'm not gonna

405
00:36:09.240 --> 00:36:14.200
SBU CFNS: I i'm showing that the exclusions that they are promising here. We'll see if they can

406
00:36:16.390 --> 00:36:18.519
SBU CFNS: last one P. Right.

407
00:36:19.150 --> 00:36:27.899
SBU CFNS: and it's not really P. Rad. It's a different group that's gonna use the P. Rad detector and make some applications, but they haven't picked a different name.

408
00:36:28.010 --> 00:36:30.700
SBU CFNS: I'm not

409
00:36:30.850 --> 00:36:39.689
SBU CFNS: the group.

410
00:36:39.710 --> 00:36:40.359
Yeah.

411
00:36:40.620 --> 00:36:48.880
SBU CFNS: So they just have to throw in a few more detectors a photon tagger they put in a tangle of targets. Put in some tracker planes here in the back.

412
00:36:49.140 --> 00:36:50.679
SBU CFNS: there's a lot more

413
00:36:50.900 --> 00:36:53.559
SBU CFNS: detail that goes into this is not just thrown together.

414
00:36:54.710 --> 00:36:55.849
SBU CFNS: They project

415
00:36:56.110 --> 00:36:58.159
SBU CFNS: like 5 sigma coverage

416
00:36:58.820 --> 00:37:01.100
SBU CFNS: recently of this red block.

417
00:37:02.220 --> 00:37:04.820
SBU CFNS: and although they don't show the

418
00:37:05.460 --> 00:37:08.990
SBU CFNS: the like 17 in here. This does cover the smt

419
00:37:10.070 --> 00:37:13.249
SBU CFNS: and they said they could do it

420
00:37:13.650 --> 00:37:16.669
SBU CFNS: all the

421
00:37:19.070 --> 00:37:19.859
SBU CFNS: there.

422
00:37:20.240 --> 00:37:23.770
SBU CFNS: so they they

423
00:37:24.220 --> 00:37:25.369
I don't think so.

424
00:37:25.800 --> 00:37:30.190
SBU CFNS: I I don't think so, but I I didn't see it.

425
00:37:30.440 --> 00:37:34.560
SBU CFNS: but if they seem to think they can use the

426
00:37:36.500 --> 00:37:38.610
SBU CFNS: so they they think it's it's

427
00:37:38.690 --> 00:37:43.920
SBU CFNS: It has been approved for 60 days, and that's what they say. They need to do this. The timeline is unclear.

428
00:37:44.530 --> 00:37:45.310
SBU CFNS: but

429
00:37:47.580 --> 00:37:50.050
SBU CFNS: that is the state of it.

430
00:37:50.380 --> 00:37:51.330
SBU CFNS: Okay.

431
00:37:53.090 --> 00:37:57.560
SBU CFNS: that's lots of odds. It ends. Here's my really picky summary.

432
00:37:57.580 --> 00:38:03.319
SBU CFNS: The anomalies are still there. Some of them have gotten a little bit bigger, but you know

433
00:38:03.340 --> 00:38:04.379
SBU CFNS: poorly.

434
00:38:04.600 --> 00:38:07.770
SBU CFNS: and we don't yet have an inclusive explanation.

435
00:38:08.470 --> 00:38:13.460
SBU CFNS: Some experiments are coming online in nice ways, and it might be able to help us out

436
00:38:14.580 --> 00:38:20.319
SBU CFNS: the X 17, though I think we're all going to hope that it doesn't, because that's way more interesting. We'll live in

437
00:38:20.490 --> 00:38:31.660
SBU CFNS: in some cases some of the current I showed you will provide complimentary coverage with darkness and aerial, and of course some of them are more directly, you know, looking at the same couple of

438
00:38:31.990 --> 00:38:33.809
SBU CFNS: So to quote

439
00:38:33.990 --> 00:38:46.089
SBU CFNS: a recent document favoring these experiments, this area is exciting and timely. The measurement search is needed, and will receive significant attention if completed before their competitors.

440
00:38:46.120 --> 00:38:48.430
SBU CFNS: This is not written about our expert.

441
00:38:48.810 --> 00:38:50.699
SBU CFNS: All right.

442
00:38:51.350 --> 00:38:58.109
SBU CFNS: So this question is why you're going. It's your question online, or it's common to have. I think I definitely ran over 9. So

443
00:38:58.550 --> 00:38:59.740
SBU CFNS: apologize there

444
00:39:05.180 --> 00:39:07.390
SBU CFNS: the the

445
00:39:07.870 --> 00:39:11.019
SBU CFNS: This is their second pass through the pack. They bring me back

446
00:39:13.360 --> 00:39:20.210
SBU CFNS: initial last time, and they gave back in.

447
00:39:20.250 --> 00:39:21.120
Just

448
00:39:21.170 --> 00:39:22.129
so.

449
00:39:22.300 --> 00:39:23.879
SBU CFNS: at least the pack lies

450
00:39:25.590 --> 00:39:27.570
the region's Video.

451
00:39:27.640 --> 00:39:33.280
SBU CFNS: So it's so impressive that you

452
00:39:33.620 --> 00:39:34.380
Thank you.

453
00:39:34.590 --> 00:39:38.729
SBU CFNS: I

454
00:39:39.040 --> 00:39:39.979
SBU CFNS: also

455
00:39:40.250 --> 00:39:41.559
SBU CFNS: it.

456
00:39:42.010 --> 00:39:44.139
SBU CFNS: if somebody knows somebody on this group.

457
00:39:44.660 --> 00:39:49.899
SBU CFNS: we need to encourage them in in their proposal, they show

458
00:39:50.290 --> 00:39:53.359
SBU CFNS: our exclusion from the darkened aerial.

459
00:39:53.430 --> 00:40:03.229
SBU CFNS: which is brand new. But this spot, which is also in their proposal there is, you know, ancient, dark white from 2,012. So someone needs this up for you now.

460
00:40:06.080 --> 00:40:08.450
SBU CFNS: all right, because our society

461
00:40:09.170 --> 00:40:13.309
SBU CFNS: Yeah, it's not broad, broad spectrum. But I mean this

462
00:40:13.360 --> 00:40:14.860
SBU CFNS: dark, this dark like.

463
00:40:14.970 --> 00:40:18.359
SBU CFNS: and it's fictional incarnation covered a lot of

464
00:40:19.510 --> 00:40:25.319
SBU CFNS: they were being recorded. I should be a little bit more careful.

465
00:40:25.630 --> 00:40:26.450
SBU CFNS: so

466
00:40:26.510 --> 00:40:31.950
SBU CFNS: that

467
00:40:36.310 --> 00:40:40.020
yes.

468
00:40:40.240 --> 00:40:46.469
SBU CFNS: 8. Yeah. So so why did they do

469
00:40:47.250 --> 00:40:55.259
SBU CFNS: so? I mean, Apex has this problem to set the magn face. Couldn't get those small separations.

470
00:40:59.390 --> 00:41:02.320
SBU CFNS: It's the only

471
00:41:03.230 --> 00:41:07.170
SBU CFNS: yeah I I I I don't. I have a number that paper so

472
00:41:07.310 --> 00:41:11.140
SBU CFNS: exactly how this

473
00:41:12.120 --> 00:41:13.459
SBU CFNS: I think we still are.

474
00:41:15.330 --> 00:41:16.040
Yeah.

475
00:41:16.140 --> 00:41:19.980
SBU CFNS: it's it's a little bit sad to me that

476
00:41:20.410 --> 00:41:21.509
SBU CFNS: early

477
00:41:22.720 --> 00:41:24.390
SBU CFNS: competitors in the seal

478
00:41:24.840 --> 00:41:26.399
SBU CFNS: can

479
00:41:27.790 --> 00:41:30.419
SBU CFNS: get down to the interesting region right now.

480
00:41:39.270 --> 00:41:39.990
So.

481
00:41:46.410 --> 00:41:47.299
SBU CFNS: hey.

482
00:41:49.110 --> 00:41:51.349
i'm not sure. You got your chair.

483
00:41:51.640 --> 00:41:57.310
SBU CFNS: Yeah, sure.

484
00:41:57.430 --> 00:41:58.060
Yeah.

485
00:42:00.980 --> 00:42:02.450
Ernie I: Okay, so

486
00:42:02.940 --> 00:42:06.900
Ernie I: Chris, right. I was gonna bring up the model. We'll start talking.

487
00:42:06.980 --> 00:42:11.129
Ernie I: I don't have a prepared set of slides because I only found out I was talking it

488
00:42:11.300 --> 00:42:12.790
Ernie I: on Wednesday night.

489
00:42:13.330 --> 00:42:13.959
Ernie I: and

490
00:42:14.590 --> 00:42:19.620
Ernie I: I have a final design review at Jailab Monday and Tuesday

491
00:42:20.400 --> 00:42:22.590
Ernie I: for a different experiment.

492
00:42:24.590 --> 00:42:25.390
Ernie I: So.

493
00:42:26.520 --> 00:42:28.210
Ernie I: Chris, can you bring up the model.

494
00:42:31.080 --> 00:42:32.439
Christopher J Vidal: Give me a

495
00:42:32.560 --> 00:42:33.209
sure

496
00:42:33.660 --> 00:42:39.780
Ernie I: let me show you some other things what we're doing this let me see if I can share my screen and

497
00:42:40.720 --> 00:42:43.739
Ernie I: first off. So i'm going to talk about the permanent magnet.

498
00:42:45.850 --> 00:42:50.040
Ernie I: I haven't been the the front person on this.

499
00:42:50.730 --> 00:42:56.649
SBU CFNS: can you see anything or no.

500
00:42:56.710 --> 00:42:59.339
Ernie I: Can you see a hall back array? No.

501
00:43:00.280 --> 00:43:05.639
Ernie I: yeah. Just the bottom of the I'll try it again for me. 1 s.

502
00:43:11.140 --> 00:43:21.360
Ernie I: Did that work better. Okay. So just so that people who may or may not be familiar with Alllak array. This is a permanent magnet quadrupole

503
00:43:21.690 --> 00:43:28.169
Ernie I: developed by a guy named Klaus Hallb at Berkeley and These are small blocks of

504
00:43:28.270 --> 00:43:34.959
Ernie I: 4 square, and going into the paper would be 90 deep.

505
00:43:34.980 --> 00:43:42.399
Ernie I: They would be made out of sumerium cobalt magnets. They're magnetized to different directions. So say we start

506
00:43:45.150 --> 00:43:49.569
Ernie I: you know, at, say, 10 o'clock. There's one pointed straight in

507
00:43:49.900 --> 00:43:53.380
Ernie I: Okay, that's one side of the quarter poll, and then one it.

508
00:43:53.560 --> 00:43:59.980
Ernie I: you know roughly 4 o'clock is pointing the other way, and 2 o'clock and

509
00:44:00.590 --> 00:44:03.410
Ernie I: would that be 8 8 o'clock.

510
00:44:03.640 --> 00:44:09.669
Ernie I: our point of the office direct. That's a quarter poll. You can rotate it to get the other access. So what happens? Is

511
00:44:10.360 --> 00:44:11.330
Ernie I: the other

512
00:44:11.940 --> 00:44:14.349
Ernie I: the other Magn. That's basically

513
00:44:14.620 --> 00:44:17.470
Ernie I: help you go from being pointed out.

514
00:44:17.550 --> 00:44:22.760
Ernie I: They rotated 45 degrees They rotated 45 degrees. And then they finally pointed back in.

515
00:44:23.120 --> 00:44:32.269
Ernie I: You can use different segments. We could have made this out of 8 segments. They they're just. They proposed you in 16 segments because you get lower number of

516
00:44:32.700 --> 00:44:34.349
Ernie I: harmonic content.

517
00:44:34.490 --> 00:44:38.429
Ernie I: We have bids for these things, and I think they have

518
00:44:38.980 --> 00:44:40.939
Ernie I: 3 tesla per meter

519
00:44:40.960 --> 00:44:44.049
Ernie I: gradient. oh, there it is, Open the corner.

520
00:44:44.340 --> 00:44:45.049
Ernie I: Yeah.

521
00:44:45.170 --> 00:44:46.939
Ernie I: 3.3 Tesla meter

522
00:44:47.270 --> 00:44:49.259
Ernie I: for gradient

523
00:44:50.400 --> 00:44:56.279
Ernie I: And we bought 3 units of these. Let me show you that. Let me stop this

524
00:44:58.740 --> 00:45:00.460
Ernie I: share my screen

525
00:45:01.600 --> 00:45:09.459
Ernie I: A. And I didn't do much of this work. So i'm sorry if i'm speaking for Kate or somebody who actually did the work.

526
00:45:11.220 --> 00:45:11.930
hey?

527
00:45:14.160 --> 00:45:19.929
SBU CFNS: Can you see? Which can you see? Same thing?

528
00:45:21.050 --> 00:45:25.009
Ernie I: Okay, let me slide it up.

529
00:45:25.390 --> 00:45:26.850
SBU CFNS: How about that?

530
00:45:27.420 --> 00:45:28.299
Ernie I: Is that it?

531
00:45:28.330 --> 00:45:43.140
Ernie I: That's that's what I have. So there's the you know the harmonic content the scenario call out what it's made out of. I've worked with these people before they're experts. It's just stuff. If you have to build permanent magnets. It gets put into an aluminum housing. That's Edm.

532
00:45:45.610 --> 00:45:46.589
Ernie I: And

533
00:45:48.500 --> 00:45:51.719
Ernie I: there it comes up pretty nice.

534
00:45:51.870 --> 00:46:00.429
Ernie I: What what is Edm? You said it's wire electron discharge machining. They wire cut the slight the aluminum

535
00:46:01.090 --> 00:46:09.219
Ernie I: to to put the segments in, and because these things want to pull together or fly apart, depending on the forces.

536
00:46:09.280 --> 00:46:12.909
Ernie I: So these are very, very strong magnets.

537
00:46:13.620 --> 00:46:14.339
Ernie I: you know.

538
00:46:14.470 --> 00:46:15.979
Ernie I: So you have to be very careful.

539
00:46:17.110 --> 00:46:19.370
Ernie I: This one won't demagnetize

540
00:46:19.830 --> 00:46:24.540
Ernie I: in, you know, up to a Tesla field. So we're not worried about the placement of them

541
00:46:24.650 --> 00:46:30.609
Ernie I: in relationship to the to the dipoles we were building. I believe you bought 3 sets.

542
00:46:30.680 --> 00:46:31.430
Ernie I: Doug

543
00:46:37.140 --> 00:46:42.869
SBU CFNS: Doug. You bought 3 sets of these magnets. And

544
00:46:43.050 --> 00:46:48.999
Ernie I: yeah they were. What? How much was the total, 1210,300. Okay.

545
00:46:49.250 --> 00:46:54.600
Ernie I: So that's very reasonable, because material is very expensive, and it's very specialized to make these things.

546
00:46:56.150 --> 00:46:57.529
Ernie I: So now i'm gonna

547
00:46:57.730 --> 00:47:01.500
Ernie I: drop out of this and let Chris share his screen with the model.

548
00:47:02.280 --> 00:47:06.210
Christopher J Vidal: You ready, Chris. Yep. Yep. Just tell me what you want.

549
00:47:06.280 --> 00:47:07.960
Ernie I: Just bring up the overall model

550
00:47:08.470 --> 00:47:12.640
Ernie I: the overall. Yeah. So maybe get a plan, almost a plan view

551
00:47:12.780 --> 00:47:15.889
Ernie I: of the the bottom view that I see right now.

552
00:47:21.230 --> 00:47:25.710
Ernie I: So so we interrupt. So you can see this one. Okay, you can't see the

553
00:47:25.760 --> 00:47:28.759
Ernie I: the 3. Let me see if I can annotate in here.

554
00:47:34.820 --> 00:47:35.569
Ernie I: So

555
00:47:38.000 --> 00:47:38.669
Ernie I: but

556
00:47:38.930 --> 00:47:42.129
Ernie I: it's not color. The color is bad. Let me change it.

557
00:47:43.830 --> 00:47:44.459
Yeah.

558
00:47:44.880 --> 00:47:48.259
Ernie I: So there are 3 sets of quads here

559
00:47:48.320 --> 00:47:53.259
Ernie I: as a triplet, so you'd have horizontal, vertical, horizontal focusing.

560
00:47:53.380 --> 00:48:00.550
Ernie I: There's a set of regular quadrupols after that. That just goes into a dump coming in, because the beams come in in this direction

561
00:48:01.150 --> 00:48:16.869
Ernie I: the foil would be in the middle of the target chamber. And then there's these 2 dipole magnets that Harold designed to bend the beam out of plane and and have a fairly large acceptance in both parameters. Can you go to that? Chris?

562
00:48:19.200 --> 00:48:21.839
Ernie I: Yeah, Go to the dipole

563
00:48:26.640 --> 00:48:27.740
Ernie I: So

564
00:48:27.990 --> 00:48:33.320
Ernie I: take a section through at the mid-plane or so, or show this chamber so I can show

565
00:48:33.550 --> 00:48:39.190
Ernie I: or or dub. Is it easy for you to show the one you were showing the other day, with all the traces going through it.

566
00:48:42.690 --> 00:48:43.419
Ernie I: you know.

567
00:48:43.950 --> 00:48:46.890
SBU CFNS: Not as fast as that's gonna

568
00:48:47.030 --> 00:49:06.900
Ernie I: first can do the on section through the Midway. If I could resource control. Go with the way Zoom is for some reason it hides those controls. Well, it'd go offline and get it and come back. No, no, I'm: I'm, I'm getting it. Just kind of move things around. Okay, Very nice. Okay.

569
00:49:06.910 --> 00:49:07.689
Ernie I: So

570
00:49:08.810 --> 00:49:11.310
Ernie I: the magnet comes in. It's a C magnet.

571
00:49:11.370 --> 00:49:14.360
Ernie I: meaning there's a return. You over here.

572
00:49:14.390 --> 00:49:19.389
Ernie I: and there's no return. You' on the other side. So you know, looking at it.

573
00:49:19.630 --> 00:49:22.700
Ernie I: the the field lines go like this.

574
00:49:22.960 --> 00:49:25.319
Ernie I: The Dipole field is in here.

575
00:49:25.340 --> 00:49:28.550
Ernie I: and we just have to optimize to make sure that

576
00:49:28.700 --> 00:49:31.920
Ernie I: first off the thing wants to clamp down

577
00:49:32.060 --> 00:49:37.919
Ernie I: as you powered up. So I we're gonna have to add a post here to keep it from collapsing.

578
00:49:37.980 --> 00:49:38.879
Ernie I: And then

579
00:49:39.280 --> 00:49:50.379
Ernie I: I've been asking to try to figure out. I didn't design the pole tips in this, Harold, but I want to make sure that it has a wide enough good field region going across because

580
00:49:50.490 --> 00:49:53.970
Ernie I: you're trying to capture a lot of rays.

581
00:49:54.110 --> 00:49:55.270
Ernie I: And so

582
00:49:55.340 --> 00:49:57.529
Ernie I: you know, all the way out here.

583
00:49:57.800 --> 00:50:02.170
Ernie I: You're trying to capture it. So you want to make sure that you have a decent good field region

584
00:50:04.010 --> 00:50:04.939
Ernie I: and

585
00:50:05.360 --> 00:50:13.269
Ernie I: across, and what the the bending is, you know I didn't do this. I didn't design it, so I don't know what the effect

586
00:50:14.000 --> 00:50:21.840
Ernie I: effective field length. The integral of Bdl across that whole line is mechanically. This is very straightforward to make it's a

587
00:50:24.180 --> 00:50:29.000
Ernie I: solid conductor number 7 solid conductor

588
00:50:29.010 --> 00:50:46.830
Ernie I: we were looking at. Maybe either I was asking the other day about how long this experiment will run, and it sounds about 3 years, so that defines how I have to make the coils. I don't I I could have just wet wound it, but i'm not going to. I'll. I'll back in pot it, but it's not our air. It's an air cooled magnet, so it's not

589
00:50:47.160 --> 00:50:49.240
Ernie I: water cooled it's not.

590
00:50:49.420 --> 00:50:58.130
Ernie I: It's not a complex wind. It's it's we're gonna use square, conductor, and you just build a a mandrel that matches the inside of the

591
00:50:58.300 --> 00:50:59.300
Ernie I: the

592
00:50:59.630 --> 00:51:03.199
Ernie I: Think i'll probably had it. Have it wound outside.

593
00:51:03.340 --> 00:51:06.719
Ernie I: We're trial, still trying to decide whether I where I sub

594
00:51:07.060 --> 00:51:13.849
Ernie I: the whole, I probably see what the delivery time is, whether I sub the steel to one company and

595
00:51:14.090 --> 00:51:15.680
Ernie I: the

596
00:51:16.490 --> 00:51:17.759
Ernie I: coils the other.

597
00:51:17.910 --> 00:51:19.789
Ernie I: The field is modest

598
00:51:19.970 --> 00:51:20.810
Ernie I: in

599
00:51:20.930 --> 00:51:22.259
Ernie I: dipole world.

600
00:51:22.280 --> 00:51:29.929
Ernie I: so i'm not worried about steel quality per se as much as I might be if I was pushing Push in the fields way up.

601
00:51:32.240 --> 00:51:33.270
Ernie I: we're.

602
00:51:33.650 --> 00:51:37.120
Ernie I: I've assigned a new engineer or a different engineer

603
00:51:37.230 --> 00:51:38.129
Ernie I: to help

604
00:51:38.460 --> 00:51:43.750
Ernie I: push this along. This will be a subt, so it will include the chamber, the coils.

605
00:51:43.850 --> 00:51:49.359
Ernie I: and the outside and structural analysis of it. go back to your other drawn, Chris.

606
00:51:54.930 --> 00:51:55.879
Ernie I: Excuse me.

607
00:51:56.150 --> 00:52:00.889
SBU CFNS: So it's some of the

608
00:52:01.390 --> 00:52:06.109
SBU CFNS: like for for downward face interests.

609
00:52:09.810 --> 00:52:10.770
SBU CFNS: Hey? We

610
00:52:11.260 --> 00:52:21.580
Ernie I: we're iterating on that. I, Doug, can comment. We talked different things about what we wanted to do. I don't know exactly why I didn't do any of the ray tracing through it, so I don't know.

611
00:52:21.690 --> 00:52:24.149
Ernie I: So Doug's getting a a field plot.

612
00:52:25.270 --> 00:52:38.780
Ernie I: and then he'll he'll do the tracking through, and then we'll optimize the chamber. Nothing's locked in stone here. Jim Kelsey, Jim Kelsey Jim Kelsey did the did the analysis on the collapsing of the Chamber.

613
00:52:42.930 --> 00:52:44.529
Ernie I: And

614
00:52:49.770 --> 00:52:54.250
Ernie I: Chris, can you give a scale to everything like, how big is that

615
00:52:54.390 --> 00:53:04.020
Ernie I: something here? So you got an idea how? What size, Con flat is that set of 14 and a half or something?

616
00:53:05.260 --> 00:53:06.290
Hold on.

617
00:53:13.470 --> 00:53:20.099
Ernie I: Okay. So that gives you an idea of the size of these magnets when you scan back out.

618
00:53:20.340 --> 00:53:26.830
Ernie I: So you know you're not talking the largest mag in the world. It's, you know, fairly straightforward.

619
00:53:27.570 --> 00:53:31.299
Ernie I: Do you know what the weight of it was? Chris? I know you were looking at the other day.

620
00:53:31.620 --> 00:53:34.920
Christopher J Vidal: what do we at £1,500?

621
00:53:35.820 --> 00:53:36.819
Ernie I: Okay, yeah.

622
00:53:36.860 --> 00:53:38.779
Ernie I: So under under a ton.

623
00:53:41.470 --> 00:53:44.729
Ernie I: that's about all I can present right now on these magnets.

624
00:53:49.000 --> 00:53:56.090
Ernie I: we know we do. We know what the delivery date is, and I can work back about how to get this done in that time period.

625
00:53:56.410 --> 00:53:59.200
Ernie I: When would you? When would these things want to be done.

626
00:54:00.490 --> 00:54:02.589
Christopher J Vidal: Here's your scale factor. I mean.

627
00:54:03.050 --> 00:54:04.149
Ernie I: Yeah, okay.

628
00:54:04.270 --> 00:54:20.909
SBU CFNS: yeah, I think that will be.

629
00:54:21.370 --> 00:54:25.279
SBU CFNS: I think the earliest we would want is May. But

630
00:54:26.670 --> 00:54:27.299
Ernie I: okay.

631
00:54:27.330 --> 00:54:35.949
Ernie I: I I knew it is, I knew it was an accelerated time scale, and that's why I was asking, because all that's how i'll work to figure out how to get them made.

632
00:54:36.030 --> 00:54:39.380
Ernie I: Yeah, and get them made it cost effectively.

633
00:54:39.570 --> 00:54:43.449
Ernie I: and then the sec. The third question I had was

634
00:54:45.190 --> 00:54:57.689
Ernie I: long term, i'm making these pretty robust. But is this the type of magnet that will end up getting moved, used over again for different searches in different places? Because that sort of tells me how I want to make it.

635
00:54:58.330 --> 00:54:59.670
SBU CFNS: Yeah, I

636
00:55:00.020 --> 00:55:03.019
SBU CFNS: We we will move the magnets from

637
00:55:03.100 --> 00:55:05.519
SBU CFNS: from what it's. Picture there

638
00:55:05.920 --> 00:55:20.050
SBU CFNS: to another beam line when we go to 50 55 M. A. V. And that point 30 will change, and their angles will change, but that's, but but the fields are the same. I don't have to change the the

639
00:55:20.080 --> 00:55:21.779
SBU CFNS: The field will change a little bit.

640
00:55:21.990 --> 00:55:25.790
SBU CFNS: No, but you

641
00:55:27.500 --> 00:55:38.739
Ernie I: okay. But i'm not. They don't have to run twice points to the field. That's the kind of question I mean, if I want to run them longer than 3 years. So

642
00:55:38.860 --> 00:55:50.819
Ernie I: okay, no, no. 3 3 year. Look, If you told me it was had to last a year. I make it a certain way. You tell me it has has the last 3 years. I make it a way that lasts like any other accelerator market.

643
00:55:50.850 --> 00:55:58.210
Ernie I: Yeah. So that's the answer. So i'm not going to use B stage. I'm not gonna you know.

644
00:55:58.480 --> 00:56:01.679
Ernie I: Just wet wind it and put B stage around a throat and another.

645
00:56:01.800 --> 00:56:07.560
SBU CFNS: So if you were here during the copy break I would be really curious. I asked you more about

646
00:56:08.010 --> 00:56:21.769
Ernie I: what do you do with the that you only have to last 12 months because I I I I I went. I wet wind it, meaning you just basically pain epoxy on as you wind it.

647
00:56:21.910 --> 00:56:25.440
Ernie I: and then you throw B stage, which is vacuum, and

648
00:56:25.470 --> 00:56:26.819
Ernie I: it's a

649
00:56:27.600 --> 00:56:31.020
Ernie I: it's epoxy impregnated

650
00:56:31.370 --> 00:56:42.509
Ernie I: tape that you put around the outside, and it's heat activated. So you throw it in a furnace, and and so it's exactly what I did for for the Mueller test coil.

651
00:56:42.960 --> 00:56:45.089
Ernie I: We we we wet wound it.

652
00:56:45.300 --> 00:56:55.579
Ernie I: Krishna kumar, and you know. But it was just for a test magnet. For one time my has not tells me that the problem is these things in all shorts over time.

653
00:56:56.130 --> 00:57:01.629
Ernie I: Yeah, they are well, or things call apart. Yeah, it's not a great deal.

654
00:57:02.170 --> 00:57:06.190
Ernie I: It's not something. It's not a long term solution.

655
00:57:06.460 --> 00:57:08.509
Ernie I: Excuse me.

656
00:57:08.590 --> 00:57:10.880
SBU CFNS: it's not the express magnet.

657
00:57:11.030 --> 00:57:11.850
Yes.

658
00:57:12.250 --> 00:57:18.370
SBU CFNS: yeah, Ernie, the

659
00:57:18.580 --> 00:57:23.640
SBU CFNS: that that we go up now is designed for 31. Me.

660
00:57:23.860 --> 00:57:24.479
Yeah.

661
00:57:24.620 --> 00:57:31.669
SBU CFNS: And I assume we're going to think of a power supply that will provide that current.

662
00:57:31.810 --> 00:57:34.420
SBU CFNS: These These coils were air cooled, and I I

663
00:57:34.660 --> 00:57:37.439
Ernie I: I can't remember off the top my head, but I was, you know.

664
00:57:37.490 --> 00:57:47.349
Ernie I: 1520 Amp. DC. Power supply, and the voltage wasn't very much, either. These are standard off the shelf cot supplies. We probably have them at the lab.

665
00:57:47.560 --> 00:57:56.569
SBU CFNS: Yeah, what I was asked going to ask is if we wanted to run them at 55 M. A. B. So

666
00:57:57.340 --> 00:58:08.059
Ernie I: I have to look at everything, and then you'd have to rerun it it. The thing I would worry about more is the fact that this is a C. Magnet, and the return yolk looks pretty thin.

667
00:58:08.250 --> 00:58:11.999
Ernie I: so you might start saturating the seat, the return.

668
00:58:12.250 --> 00:58:13.260
Ernie I: and then

669
00:58:13.290 --> 00:58:20.710
Ernie I: it would become nonlinear, and that's not a place you look. You could run it. You could just run the hell out of it, or you could put a fan on the coils.

670
00:58:20.790 --> 00:58:21.500
But

671
00:58:21.830 --> 00:58:24.429
Ernie I: if I need to, if it's going to run there.

672
00:58:25.210 --> 00:58:30.979
Ernie I: you need to know that up front I I, I do have to give you a disclaimer. I had nothing

673
00:58:31.010 --> 00:58:32.979
Ernie I: to do with the poll

674
00:58:33.300 --> 00:58:34.299
Ernie I: design.

675
00:58:34.340 --> 00:58:39.250
Ernie I: so the fact that i'm just taking a poll design and putting it in a magnet frame

676
00:58:40.430 --> 00:58:44.580
Ernie I: and putting a coil on it. That'll drive a certain field. The fact that it.

677
00:58:45.050 --> 00:58:49.670
Ernie I: the focusing and the full face rotations and all that. I don't know

678
00:58:49.780 --> 00:59:02.950
Ernie I: what it's supposed to do, and I didn't do. I can't do the ray tracing through it. So I there's always been a line of demarcation. I get design magnets, and I can put

679
00:59:03.230 --> 00:59:04.000
Ernie I: field.

680
00:59:04.190 --> 00:59:10.100
Ernie I: you know. Return yolks and magazine coils, and I don't. I don't do any ray tracing.

681
00:59:10.490 --> 00:59:20.939
SBU CFNS: Yeah. So I don't even have the capabilities.

682
00:59:21.080 --> 00:59:22.949
SBU CFNS: The question is.

683
00:59:23.580 --> 00:59:29.470
SBU CFNS: right now there's 31 at the O, but go into the

684
00:59:29.490 --> 00:59:31.570
SBU CFNS: We need a calibration. But

685
00:59:33.560 --> 00:59:37.299
Ernie I: yeah, I I would ask. I would ask Harold

686
00:59:38.090 --> 00:59:43.510
Ernie I: when you so so there's a couple of tricks you can play with the ends of a magnet.

687
00:59:43.580 --> 00:59:44.500
Ernie I: so

688
00:59:44.980 --> 00:59:55.739
Ernie I: as you start driving the field up, the effective field length might end up increasing. And we there's ways to design it so it doesn't. So it's kind of uniform across the

689
00:59:55.870 --> 01:00:00.100
Ernie I: a normal set of parameters of fields, the effective field length

690
01:00:00.380 --> 01:00:09.740
Ernie I: because you don't want it when you turn it up to end up bending more than the amount that you think you're going to bend, and that's what would happen if it if it's not designed.

691
01:00:09.840 --> 01:00:24.199
SBU CFNS: Yeah, no. But you understand. Otherwise you'd taken the wrong path through it, because we understand it. You know they did celebrate with molar if you wanted to, that doesn't work, either.

692
01:00:28.080 --> 01:00:29.649
SBU CFNS: Okay, right now

693
01:00:29.860 --> 01:00:35.309
SBU CFNS: we could. We can then 31 mev into the gems and get a calibration. So

694
01:00:35.960 --> 01:00:39.019
SBU CFNS: it we

695
01:00:39.180 --> 01:00:39.979
SBU CFNS: and all right.

696
01:00:40.240 --> 01:00:43.420
SBU CFNS: 75 70% for a field

697
01:00:43.490 --> 01:00:51.799
SBU CFNS: that? No, just as the calibration point.

698
01:00:52.310 --> 01:00:59.919
SBU CFNS: Yeah. But if you need something that works at that, so you're down at 11 or 18 at a. B. So you remember this time.

699
01:01:05.230 --> 01:01:08.799
SBU CFNS: But it's not it. It's on x and you that's like 31, I mean.

700
01:01:08.830 --> 01:01:11.000
SBU CFNS: and we'll vote on this.

701
01:01:11.720 --> 01:01:12.490
Okay?

702
01:01:14.160 --> 01:01:14.930
SBU CFNS: Oh.

703
01:01:15.040 --> 01:01:16.729
that's possibly. Yes.

704
01:01:16.750 --> 01:01:19.309
SBU CFNS: yeah, yeah. And and

705
01:01:19.410 --> 01:01:20.379
SBU CFNS: that's true.

706
01:01:20.640 --> 01:01:21.399
That's fine.

707
01:01:23.570 --> 01:01:34.689
SBU CFNS: I

708
01:01:42.860 --> 01:01:43.830
it's

709
01:01:52.850 --> 01:01:57.310
SBU CFNS: yeah.

710
01:01:57.850 --> 01:02:01.310
SBU CFNS: And then the

711
01:02:01.490 --> 01:02:04.080
SBU CFNS: would we actually calibrate the

712
01:02:04.640 --> 01:02:06.280
SBU CFNS: but I don't think it's 30.

713
01:02:07.190 --> 01:02:16.030
SBU CFNS: Yeah. I would feel like you met up if you if you have a

714
01:02:16.620 --> 01:02:20.479
SBU CFNS: that's

715
01:02:20.660 --> 01:02:24.759
SBU CFNS: that that's fine. I think we could do that.

716
01:02:26.920 --> 01:02:32.720
SBU CFNS: yeah, flip in the fields. No big deal for this. But now you're you're calibrating it. You don't want to

717
01:02:32.760 --> 01:02:43.590
SBU CFNS: right power down and back up, right. You want to leave it. Oh, that doesn't really matter! This this thing is totally linear and you could set it back

718
01:02:44.030 --> 01:02:59.349
Ernie I: if you have a cycling you could set it back to the same values. And this kind of currents you can use switches they use on done like golf carts to switch the polarities if you need to do it remotely.

719
01:02:59.420 --> 01:03:00.479
Ernie I: Yeah, you know.

720
01:03:00.580 --> 01:03:03.310
Ernie I: forward and reverse on golf cards.

721
01:03:03.370 --> 01:03:04.200
SBU CFNS: Yeah.

722
01:03:06.180 --> 01:03:16.050
SBU CFNS: Yeah, One of them one is obviously in the office of

723
01:03:16.130 --> 01:03:21.309
SBU CFNS: but we'd like to calibrate it at the normal electron polarity.

724
01:03:21.370 --> 01:03:22.189
Ernie I: Okay.

725
01:03:22.980 --> 01:03:27.939
SBU CFNS: yeah. so Chris, do you want to just show

726
01:03:28.110 --> 01:03:30.609
Ernie I: the the view again, and the the

727
01:03:31.120 --> 01:03:39.339
Ernie I: the assembly, just to give you the orientation. If you look for the top where the permanent magnets are a relationship to the dipole. So the dipoles to the.

728
01:03:39.480 --> 01:03:40.710
Ernie I: to the

729
01:03:40.760 --> 01:03:41.920
Ernie I: main field.

730
01:03:42.370 --> 01:03:46.099
Christopher J Vidal: Give me a minute because I closed it so I could work on my stuff.

731
01:03:50.630 --> 01:03:55.569
Christopher J Vidal: I do as soon as I close the you and ask me to open again. But I get stuff that I need to do.

732
01:03:57.240 --> 01:04:00.060
Ernie I: see, Stan has a question: what's up? Stan.

733
01:04:00.340 --> 01:04:08.030
Stan Yen: Yeah. When we do the polarity switches? Do we know how much the hysteresis is going to be

734
01:04:08.110 --> 01:04:12.939
Ernie I: that that that you'll get out of doing a magnet test, and usually what I do is I.

735
01:04:13.350 --> 01:04:21.939
Ernie I: If I was going to cycle this magnet, I just drive it beyond where you're going to run. You always want to come back down at your set point, so if you run past it

736
01:04:21.970 --> 01:04:26.400
Ernie I: and closer up, you know, if you could run it to saturation, that would be great, but you probably can't.

737
01:04:26.510 --> 01:04:38.600
Ernie I: and so you run it above and come back down, and you're These are pretty good power supplies. You'll be able to hit the numbers on that magnet. The Hysteresis will repeat as long as you don't try to go from 0 to the set point

738
01:04:39.320 --> 01:04:42.939
Ernie I: without us, without going over the field and coming back down.

739
01:04:43.050 --> 01:04:51.190
Stan Yen: That's my experience

740
01:04:52.730 --> 01:04:55.459
Ernie I: that's pretty good.

741
01:04:57.690 --> 01:05:04.970
Ernie I: hmm, cause we're not actively measuring. Yeah, that's what i'm worried about. Yeah, you're not gonna You're not gonna actively measure it.

742
01:05:05.510 --> 01:05:21.020
Richard G Milner: you know, to put a put a hall probe in there. I don't believe this is Richard I mean, I think we're going to calibrate it with elastic scattering and modeler scattering with known physical processes that should be good enough. The one is the positron arm. You have to calibrate it with electrons.

743
01:05:21.220 --> 01:05:29.189
Ernie I: So you do have to put the polarity once you got it calibrated. It's not going to change change the way the magnet reacts.

744
01:05:29.380 --> 01:05:37.780
Ernie I: you know, as long as I can drive. In that case I probably have to drive it a little harder and saturation, but we can also set it up and test that.

745
01:05:38.040 --> 01:05:40.519
Ernie I: you know we could test. If it comes back.

746
01:05:40.760 --> 01:05:48.250
Ernie I: We don't need to do that, so it'll be a that, a a step to calibrate this and that's a good, you know, Job for a student or

747
01:05:49.540 --> 01:05:50.310
about it.

748
01:05:51.520 --> 01:05:57.140
Christopher J Vidal: Hey? What did you want to get this Look straight in from the top? The plan view.

749
01:06:00.070 --> 01:06:01.750
Richard G Milner: Ernie? Yes.

750
01:06:01.820 --> 01:06:05.480
Richard G Milner: When we were at slack we used to do floating wire

751
01:06:05.640 --> 01:06:08.930
Richard G Milner: calibrations of magnets. Have you ever done that?

752
01:06:09.330 --> 01:06:28.520
Richard G Milner: I've only seen it done on quads? I haven't seen it done on D. I. I don't know if it works for this or not. They were definitely big, higher field magnets, but that was a real common technique. It's slack in addition to everything else. Yeah, I know one of the magnet companies uses it to, you know, to do testing on their bag. That's

753
01:06:28.570 --> 01:06:30.520
Ernie I: I have not personally done it.

754
01:06:31.540 --> 01:06:35.800
Ernie I: I've only I for quads. We've done the rotating coil.

755
01:06:36.050 --> 01:06:40.069
Ernie I: you know, measuring the harmonics and and

756
01:06:40.110 --> 01:06:50.260
Ernie I: putting a probe in there on an arm and just doing a plot of everything. That's what I did at J. Lab on Dipole magnet. So they they basically plot the entire

757
01:06:51.740 --> 01:06:54.670
Ernie I: for this thing. That's not a bad idea, actually.

758
01:06:54.740 --> 01:06:58.630
Ernie I: Actually, that's something. I should bring up that

759
01:06:59.760 --> 01:07:04.800
Ernie I: if we have a tie into you know Jefferson lab, they have a beautiful

760
01:07:04.900 --> 01:07:07.280
Ernie I: magnetic test area where they could

761
01:07:07.880 --> 01:07:17.710
Ernie I: scan to bore this and give you a you know, a flat plot across the entire axis, including and give you the integral of feel, feel length, and everything else.

762
01:07:17.730 --> 01:07:20.960
Ernie I: I I've used them before, but it was for stuff there

763
01:07:21.550 --> 01:07:27.280
Richard G Milner: that would mean bringing the magnets to J. Lab. I guess these are fairly light magnets.

764
01:07:27.540 --> 01:07:45.000
Ernie I: and they're not heavy. You have Jefferson Lab collaborators. So that's why i'm bringing it up. Yeah, yeah, no, it's good, and and I you know the people who used to run it. I do very well the ones I I could probably. I know the magnet group pretty well I could probably talk to people and get in there. It's a good suggestion to think about.

765
01:07:45.010 --> 01:07:50.790
Ernie I: because to replicate that is ridiculously hard. They're They're experts. It's a.

766
01:07:51.110 --> 01:07:59.770
SBU CFNS: I. I think we have such a system that try it in the old days. But it's gone, you know. Yeah, J. Labs doing it all the time. They're doing some other Magnus right now, and I

767
01:08:00.100 --> 01:08:01.650
Ernie I: They're very, very good at it.

768
01:08:03.110 --> 01:08:05.689
Ernie I: So I I would advocate for that.

769
01:08:07.380 --> 01:08:18.560
Richard G Milner: Well, let's look at the schedule. I think once we have a minute of production schedule, we can see that'll that'll be somebody. I'll have to burn a favor.

770
01:08:19.600 --> 01:08:22.949
Ernie I: is it? Oh, so you see where the permanent magnets are in relationship.

771
01:08:23.080 --> 01:08:25.020
Ernie I: the field on this magnet.

772
01:08:25.300 --> 01:08:27.369
Ernie I: If you take a dipole magnet

773
01:08:27.490 --> 01:08:29.410
Ernie I: let me annotate.

774
01:08:32.350 --> 01:08:33.419
Ernie I: If you take

775
01:08:34.720 --> 01:08:37.290
Ernie I: a dipole magnet, and these are the polls.

776
01:08:37.399 --> 01:08:39.960
Ernie I: When you get to the end you're getting to the end.

777
01:08:40.729 --> 01:08:47.739
Ernie I: There's always a question of how far does the field go out. Basically it's going to go out less than the gap.

778
01:08:47.830 --> 01:08:50.730
Ernie I: So you're gonna You know your field is going to drop off

779
01:08:50.800 --> 01:08:53.560
Ernie I: completely by the end of the gap.

780
01:08:54.170 --> 01:08:55.330
Ernie I: And so.

781
01:08:55.540 --> 01:09:07.689
Ernie I: you know you don't have, like huge feels out the end of this affecting the other line, and if the magnet return yolks designed properly, there should be no field on the outside of the yoke

782
01:09:07.850 --> 01:09:14.750
Ernie I: here and here affecting the other; and if it did, if there was small 100 Gauss. You just throw a piece of meal in there

783
01:09:14.790 --> 01:09:15.739
Ernie I: and you're done.

784
01:09:16.990 --> 01:09:21.309
SBU CFNS: Yeah, actually, I had.

785
01:09:21.520 --> 01:09:22.530
SBU CFNS: Oh, okay.

786
01:09:22.890 --> 01:09:25.010
SBU CFNS: to outside or video.

787
01:09:25.090 --> 01:09:28.690
SBU CFNS: And I calculated the field along the main line.

788
01:09:28.810 --> 01:09:41.569
SBU CFNS: and I think it was $25 to purchase with them that's not the integral along the the main 5. Okay, that's pretty high. Actually. Maybe they need more steel. Okay.

789
01:09:41.779 --> 01:09:42.620
SBU CFNS: Wow.

790
01:09:42.950 --> 01:09:56.850
SBU CFNS: Yeah. Oh, it might be because the coil stick out a little bit. It was over. It was over it was over here, I bet. Yeah, we're the where the Kon outs are very close, so it's

791
01:09:57.290 --> 01:10:01.719
SBU CFNS: you know there was an isolated peak. Yeah. And and

792
01:10:02.070 --> 01:10:05.260
Ernie I: the permanent magnitude will appear.

793
01:10:07.500 --> 01:10:11.290
Ernie I: What would you call transparent to the other fields?

794
01:10:11.680 --> 01:10:15.929
Ernie I: It's not like they're gonna They're just gonna superpose

795
01:10:16.460 --> 01:10:18.209
Ernie I: anybody have any questions on this?

796
01:10:18.750 --> 01:10:21.000
SBU CFNS: Oh, I think that's fine. I think.

797
01:10:23.240 --> 01:10:25.040
Ernie I: Richard anything no

798
01:10:25.710 --> 01:10:27.069
Ernie I: other than a schedule.

799
01:10:27.410 --> 01:10:28.059
Yeah.

800
01:10:28.410 --> 01:10:33.549
Ernie I: I think that's why we put a different. Jim and I talked, and we put a different engineer on it

801
01:10:33.850 --> 01:10:36.889
Ernie I: with Chris and myself. And

802
01:10:36.970 --> 01:10:40.009
Richard G Milner: oh, that's great. Try to try to accelerate this.

803
01:10:40.100 --> 01:10:40.880
Richard G Milner: Thank you.

804
01:10:40.950 --> 01:10:41.740
Ernie I: Okay.

805
01:10:43.900 --> 01:10:44.939
Ernie I: is that it? Then?

806
01:10:45.180 --> 01:10:48.610
SBU CFNS: Yeah. So thank you. Thanks.

807
01:10:52.250 --> 01:11:01.170
SBU CFNS: I think it is. I made my celebration 6, 30. It was possible. So it's 625 of 9, and it's a nice yeah. So

808
01:11:01.200 --> 01:11:05.060
SBU CFNS: originally our copyright was half an hour 1015 to 1045.

809
01:11:05.100 --> 01:11:07.539
SBU CFNS: You want to cut it maybe 20 min, and

810
01:11:07.620 --> 01:11:08.980
SBU CFNS: we'll start in 1050.

811
01:11:09.310 --> 01:11:11.819
SBU CFNS: That is not. You have a chance to chat it on the but.

812
01:11:23.180 --> 01:11:23.870
thanks

813
01:11:30.050 --> 01:11:46.529
SBU CFNS: it's actually a long way of

814
01:11:46.540 --> 01:12:04.010
SBU CFNS: for.

815
01:12:04.210 --> 01:12:11.689
SBU CFNS: But then they go on to say they get to.

816
01:12:32.740 --> 01:12:36.360
SBU CFNS: Okay. So

817
01:12:41.020 --> 01:12:41.699
there it

818
01:12:46.940 --> 01:12:48.310
on my side, and

819
01:12:48.400 --> 01:12:54.719
SBU CFNS: if I do show that words I got nothing.

820
01:12:54.760 --> 01:13:01.069
SBU CFNS: I was on my wi-fi and the airplane with with a stupid.

821
01:13:01.850 --> 01:13:04.850
SBU CFNS: So if it's so

822
01:13:04.870 --> 01:13:17.209
SBU CFNS: no all right. I've got nothing.

823
01:13:37.910 --> 01:13:40.290
SBU CFNS: We need to

824
01:13:41.640 --> 01:13:44.929
SBU CFNS: yeah let's try again.

825
01:13:45.540 --> 01:13:46.290
Bye.

826
01:13:46.550 --> 01:14:00.529
SBU CFNS: I did it.

827
01:14:00.850 --> 01:14:11.850
SBU CFNS: It's like, yeah, but it's not. It's been years since

828
01:14:17.750 --> 01:14:20.290
SBU CFNS: it's like it's like my email. And I said, sir

829
01:14:20.420 --> 01:14:24.209
2 years ago.

830
01:14:24.260 --> 01:14:40.670
SBU CFNS: It's only to reconfigure my IP and and everything

831
01:14:40.680 --> 01:14:52.239
SBU CFNS: within 10 min. You gotta work. Yeah, right. Everybody else will send me around in circles.

832
01:15:01.170 --> 01:15:09.040
SBU CFNS: But if that was the case, yeah. And

833
01:15:14.540 --> 01:15:21.550
SBU CFNS: you you

834
01:15:21.680 --> 01:15:28.240
SBU CFNS: you should see the

835
01:15:28.400 --> 01:15:35.630
SBU CFNS: right. Let's

836
01:15:35.650 --> 01:15:41.139
SBU CFNS: because I I tried that. Got it, price to try it at the board account.

837
01:15:42.520 --> 01:15:46.140
SBU CFNS: Oh, yeah.

838
01:16:07.320 --> 01:16:12.640
SBU CFNS: So many program started. Yeah. Why probably not connected. Okay.

839
01:16:13.100 --> 01:16:15.020
SBU CFNS: But it's I don't know. I'm figure.

840
01:16:15.170 --> 01:16:18.610
SBU CFNS: No, no, that's what I got before. Now I go here.

841
01:16:18.640 --> 01:16:20.819
SBU CFNS: and it says not configured. It's

842
01:16:21.550 --> 01:16:28.550
SBU CFNS: so. I've lost the connection to my wife, my clerk. Okay, when what does it say on the network.

843
01:16:29.250 --> 01:16:29.949
It was

844
01:16:48.000 --> 01:16:49.030
SBU CFNS: Okay.

845
01:16:54.920 --> 01:16:55.520
this is

846
01:17:14.430 --> 01:17:15.300
for the big time.

847
01:17:15.650 --> 01:17:17.869
SBU CFNS: Oh, system preferences.

848
01:17:19.190 --> 01:17:19.950
right?

849
01:17:23.160 --> 01:17:25.950
SBU CFNS: I don't see it. Yeah, it's usually there.

850
01:17:26.580 --> 01:17:29.489
This is one.

851
01:17:30.640 --> 01:17:31.650
I think this.

852
01:17:34.010 --> 01:17:39.140
SBU CFNS: So let's use the okay.

853
01:17:40.680 --> 01:17:43.280
SBU CFNS: It it doesn't see.

854
01:17:43.510 --> 01:17:44.419
You don't see them.

855
01:17:44.880 --> 01:17:49.289
SBU CFNS: So these are my adapters for for

856
01:17:50.090 --> 01:17:55.690
SBU CFNS: let's make a new one.

857
01:17:55.840 --> 01:17:57.309
SBU CFNS: Yeah, okay

858
01:18:05.240 --> 01:18:17.470
SBU CFNS: it is how it has about it. It's let's see if it's okay. It's also time consuming.

859
01:18:17.850 --> 01:18:21.320
You can see that.

860
01:18:21.800 --> 01:18:25.599
SBU CFNS: Yeah, but I wasn't sure where you wanted to.

861
01:18:25.750 --> 01:18:27.179
Okay.

862
01:18:28.570 --> 01:18:32.169
SBU CFNS: you know. Okay.

863
01:18:32.340 --> 01:18:38.820
SBU CFNS: So you have to.

864
01:18:39.320 --> 01:18:40.170
SBU CFNS: hey? Hey?

865
01:18:40.190 --> 01:18:52.479
SBU CFNS: Thank you. Yeah, Thank you. Yeah. So I sent you 2 to me. Yeah, I've got one

866
01:18:52.990 --> 01:19:14.540
SBU CFNS: I want. And then the second one for me was for tomorrow. Yeah, i'm getting students to get a lot of things, and I put the other one on there here. Yeah. So then, the the third thing I see is from setting, and it was for this one can we originally had rescheduled.

867
01:19:14.740 --> 01:19:21.149
SBU CFNS: and then I didn't see that there.

868
01:19:40.640 --> 01:19:41.840
Thank you.

869
01:19:42.790 --> 01:19:43.450
Okay.

870
01:19:43.940 --> 01:19:44.799
I appreciate you.

871
01:19:56.580 --> 01:19:57.400
Yes.

872
01:19:59.540 --> 01:20:02.579
SBU CFNS: they're they're juicy, though

873
01:20:02.620 --> 01:20:06.360
SBU CFNS: it wasn't to pick up.

874
01:20:19.140 --> 01:20:19.769
That's like one.

875
01:20:38.240 --> 01:20:40.860
SBU CFNS: It is. Yeah.

876
01:20:55.000 --> 01:20:57.559
SBU CFNS: Thank you for showing up. Feel free to.

877
01:20:58.310 --> 01:21:04.960
SBU CFNS: People are kind of sitting here. But you're you're welcome to to sit in every like, yeah, yeah, thanks for joining.

878
01:21:05.380 --> 01:21:10.749
SBU CFNS: Nice to meet you, too.

879
01:21:11.960 --> 01:21:18.110
SBU CFNS: I'm done.

880
01:21:26.140 --> 01:21:31.609
SBU CFNS: We're good. We're having a coffee break.

881
01:21:38.270 --> 01:21:46.970
SBU CFNS: So that one's list to go under installation. But

882
01:21:59.920 --> 01:22:17.910
SBU CFNS: about

883
01:22:45.620 --> 01:23:02.389
SBU CFNS: it's called, yeah.

884
01:23:04.040 --> 01:23:08.460
I wish the

885
01:23:09.580 --> 01:23:17.679
SBU CFNS: when we have a clear idea of the schedule, it doesn't make a lot of sense. I don't

886
01:23:54.060 --> 01:23:54.730
to stand there.

887
01:23:54.750 --> 01:23:56.600
Yeah.

888
01:24:21.820 --> 01:24:24.560
SBU CFNS: but we

889
01:24:25.080 --> 01:24:32.220
SBU CFNS: it doesn't matter whether we know it's not or not.

890
01:24:36.840 --> 01:24:37.550
SBU CFNS: Okay.

891
01:24:37.770 --> 01:24:38.990
I think.

892
01:24:39.180 --> 01:24:39.830
Yes.

893
01:24:40.140 --> 01:24:45.570
SBU CFNS: yes.

894
01:24:59.090 --> 01:25:09.900
SBU CFNS: With that we need to.

895
01:25:10.080 --> 01:25:19.500
SBU CFNS: Yeah, there is some things like that.

896
01:25:19.530 --> 01:25:26.380
SBU CFNS: I think each time

897
01:25:26.400 --> 01:25:29.089
SBU CFNS: it is a shutdown, and it

898
01:25:29.810 --> 01:25:39.529
SBU CFNS: I don't know how much that affects your

899
01:25:48.770 --> 01:26:00.809
SBU CFNS: and then and then they're off, but maybe 5 to 10 is, and then and then they're off. But maybe 5 to 10 is

900
01:26:00.890 --> 01:26:03.750
SBU CFNS: so it's very hard for me to get

901
01:26:03.850 --> 01:26:05.570
SBU CFNS: the

902
01:26:05.590 --> 01:26:11.580
Understand?

903
01:26:11.900 --> 01:26:12.460
Yeah.

904
01:26:13.110 --> 01:26:17.959
SBU CFNS: make sense

905
01:26:25.800 --> 01:26:26.519
right.

906
01:26:26.910 --> 01:26:28.129
Go ahead and ship it up.

907
01:26:46.570 --> 01:26:52.750
SBU CFNS: I'm. Showing that it was a time to think so. We would have to.

908
01:26:58.070 --> 01:27:01.479
SBU CFNS: and that might help us in the

909
01:27:04.260 --> 01:27:06.590
SBU CFNS: your contribution, and to see a lot.

910
01:27:06.670 --> 01:27:10.589
SBU CFNS: But then the question is.

911
01:27:20.240 --> 01:27:34.860
SBU CFNS: so you got me.

912
01:27:52.260 --> 01:27:55.519
SBU CFNS: The thing is that it's probably not to be drawn up yet, because they.

913
01:27:55.790 --> 01:28:06.899
SBU CFNS: you know we don't have. That's what we can get. Guys where we can get guys where we can get guys where

914
01:29:22.430 --> 01:29:25.370
SBU CFNS: that's 2 years ago.

915
01:29:25.640 --> 01:29:39.950
SBU CFNS: Yeah

916
01:29:50.290 --> 01:29:50.929
it myself.

917
01:30:22.030 --> 01:30:34.210
SBU CFNS: We're going to. We're going to. We're going to

918
01:31:03.580 --> 01:31:13.120
SBU CFNS: This is a background.

919
01:31:26.060 --> 01:31:27.500
and that's Saturday. So

920
01:31:28.220 --> 01:31:29.679
SBU CFNS: that is.

921
01:31:46.900 --> 01:32:04.300
SBU CFNS: that's okay. That's what we are.

922
01:32:05.250 --> 01:32:12.709
SBU CFNS: Oh, no, it's over here.

923
01:32:16.400 --> 01:32:21.710
SBU CFNS: It's just as annoying. Well, maybe it's it to be ready for more

924
01:32:21.850 --> 01:32:24.010
SBU CFNS: learning.

925
01:32:32.940 --> 01:32:33.670
No problem.

926
01:32:35.130 --> 01:32:38.240
SBU CFNS: let's see.

927
01:32:38.430 --> 01:32:42.350
SBU CFNS: you're Cherry. That's John

928
01:32:42.970 --> 01:32:45.179
SBU CFNS: the schedule.

929
01:32:46.220 --> 01:32:49.460
It's

930
01:32:51.510 --> 01:32:53.139
SBU CFNS: okay.

931
01:32:55.770 --> 01:32:58.480
Xiaqing Li: Yeah. Hello. Can you hear me?

932
01:32:58.810 --> 01:33:02.179
SBU CFNS: What would you like to show something? Or

933
01:33:02.310 --> 01:33:07.200
Xiaqing Li: Yeah. let me bring up the slice.

934
01:33:10.190 --> 01:33:12.469
Xiaqing Li: I look at the full screen.

935
01:33:13.500 --> 01:33:15.059
SBU CFNS: Yeah, You see.

936
01:33:15.190 --> 01:33:16.849
SBU CFNS: Yeah, that's good.

937
01:33:16.990 --> 01:33:17.849
Xiaqing Li: The great

938
01:33:17.990 --> 01:33:30.470
Xiaqing Li: Yeah. So let me show some more details about the B field map calculation for the spectrometer dipole magnet that Ernie has just introduced.

939
01:33:31.780 --> 01:33:39.439
Xiaqing Li: And this calculation was down using the ansis. Maxwell threed. Software

940
01:33:39.580 --> 01:33:46.400
Xiaqing Li: so Here is just a brief review up about the design and geometry

941
01:33:46.590 --> 01:33:54.800
Xiaqing Li: like dimensions of the magnet, the spectrum like that. So basically this design is from Harvard and this

942
01:33:54.950 --> 01:33:56.730
Xiaqing Li: CAD

943
01:33:56.970 --> 01:34:07.620
Xiaqing Li: file. I'm. Showing here, which I use as input in the field calculation is provided by Chris based on her. Input

944
01:34:07.740 --> 01:34:18.910
Xiaqing Li: so basically yeah, as here. this whole should not exist actually in our real or the most

945
01:34:18.950 --> 01:34:21.570
Xiaqing Li: recent design.

946
01:34:21.970 --> 01:34:27.599
Xiaqing Li: basically we have. We should have a coast here. And

947
01:34:28.150 --> 01:34:36.049
Xiaqing Li: yeah, I will receive it more like updated file from Chris. with this cracked it. But

948
01:34:36.260 --> 01:34:39.079
Xiaqing Li: but this essentially will not

949
01:34:39.740 --> 01:34:41.520
Xiaqing Li: po

950
01:34:41.600 --> 01:34:43.579
Xiaqing Li: cost any significant

951
01:34:43.640 --> 01:34:46.970
Xiaqing Li: difference in the in the area

952
01:34:46.990 --> 01:34:54.449
Xiaqing Li: of the distant driver of the beef that we're we're in for. So we will actually fill in that it will actually help

953
01:34:54.490 --> 01:34:57.950
Ernie I: make a more uniform field in there. And and

954
01:34:58.040 --> 01:34:59.769
Ernie I: so I would wait until

955
01:35:00.230 --> 01:35:04.549
Ernie I: we we take over the mechanical design of this. So we feedback

956
01:35:04.670 --> 01:35:11.310
Ernie I: a solid model to you with that filled in. But i'm it's very encouraging to see that filled in. It'll really help

957
01:35:11.760 --> 01:35:13.840
Ernie I: make the field much more uniform.

958
01:35:14.060 --> 01:35:19.909
Xiaqing Li: Yes, yes, I do. Yeah. 2 sides after I do see some

959
01:35:20.070 --> 01:35:31.919
Xiaqing Li: crapping behavior around this area. I guess that's due to the whole with New York

960
01:35:32.660 --> 01:35:35.660
Ernie I: in a strange way. They have to go

961
01:35:36.130 --> 01:35:38.280
Ernie I: up and then over.

962
01:35:38.310 --> 01:35:44.029
Ernie I: You know they have to go from here. They can't just go around the shortest direction.

963
01:35:44.520 --> 01:35:46.619
Ernie I: Normally, when you calculate this stuff.

964
01:35:46.920 --> 01:35:49.400
Ernie I: you almost ignore the the

965
01:35:51.030 --> 01:35:53.319
Ernie I: losses in the steel.

966
01:35:53.460 --> 01:35:59.739
Ernie I: But in this case you definitely have to say the the calculation will take care of it, but it'll be much better, anyway.

967
01:35:59.790 --> 01:36:01.209
Xiaqing Li: Yes, I agree.

968
01:36:01.350 --> 01:36:10.770
Xiaqing Li: And yeah, most mostly i'm talking about is really very, very central area about this like the the faces of the post. But

969
01:36:11.110 --> 01:36:13.349
Xiaqing Li: for this

970
01:36:13.410 --> 01:36:17.920
Xiaqing Li: this area as a whole, absolutely. We

971
01:36:17.940 --> 01:36:22.169
Xiaqing Li: fully connected return, you will be the most ideal.

972
01:36:23.890 --> 01:36:26.850
Xiaqing Li: Yeah. So the distance between

973
01:36:27.110 --> 01:36:32.870
Xiaqing Li: the 2 interfaces of the 2 coils is nice and met, but the distance between the

974
01:36:33.100 --> 01:36:38.449
Xiaqing Li: post exactly a centimeter. That's I guess, what really matters here.

975
01:36:38.850 --> 01:36:57.599
Xiaqing Li: so I put this model in the and and this is Maxwell 3D, and set up current there. So basically this design from harvest for the center of mo. This is the moment i'm. Of 30, 31 AV with this current, and

976
01:36:57.690 --> 01:37:03.239
Xiaqing Li: 6 turns in each coil. So I put this total number of

977
01:37:03.530 --> 01:37:14.639
Xiaqing Li: for the total current in each coil, as you can see here to make this current going through this interface for each coil, and then set up the solution type as Mac

978
01:37:17.960 --> 01:37:19.360
Xiaqing Li: and

979
01:37:19.470 --> 01:37:28.579
Xiaqing Li: the adaptive setup, for in terms of the relative error, I said it as 1%, which is most

980
01:37:28.730 --> 01:37:36.429
Xiaqing Li: like the the default setting answers and maximum number of passes 10, but

981
01:37:36.980 --> 01:37:42.900
Xiaqing Li: but but usually we won't use this much because it converts very fast.

982
01:37:43.000 --> 01:37:47.219
Xiaqing Li: and for the matching of the geometry I use the

983
01:37:47.460 --> 01:37:53.319
Xiaqing Li: the the so-called dynamic surface solution resolution, which means

984
01:37:53.680 --> 01:38:00.820
Xiaqing Li: Maxwell 3D. Will determine the matching of each part depending on the

985
01:38:01.030 --> 01:38:10.839
Xiaqing Li: how regular the geometry is, and in this way you can optimize the computing energy and accuracy.

986
01:38:11.530 --> 01:38:21.249
Xiaqing Li: So then, we have this results. So here is showing the the field magnitude on 2 sample plan.

987
01:38:21.310 --> 01:38:29.939
Xiaqing Li: so this is on the right hand side, basically what we are mostly interested in, which is the

988
01:38:30.550 --> 01:38:32.080
Xiaqing Li: kind of

989
01:38:32.720 --> 01:38:36.429
Xiaqing Li: the B field in like the

990
01:38:36.520 --> 01:38:44.569
Xiaqing Li: the Mirror plan between the 2 coils or 2 posts, and we also can produce the

991
01:38:44.630 --> 01:38:57.959
Ernie I: Yup. So by adding that in it'll get rid of that that high spot on the one Tesla, and you could push this steel that i'll use up to 1 point, 2 anywhere. So this. This is very encouraging.

992
01:38:58.020 --> 01:39:00.500
Ernie I: That'll tell me. That tells me that you know.

993
01:39:00.710 --> 01:39:09.260
Ernie I: If if the bulk of it's, you know lower than Point 7 everywhere that I could push this magnet pretty hard if the coils can do it.

994
01:39:09.590 --> 01:39:14.169
Xiaqing Li: Yup, Yup. So yeah, I really looking forward for the

995
01:39:14.290 --> 01:39:19.840
Xiaqing Li: updated geometry with without this whole in our design.

996
01:39:23.440 --> 01:39:26.480
Xiaqing Li: yeah, thanks for coming, and we also can

997
01:39:26.790 --> 01:39:34.129
Xiaqing Li: produce the B vector plot, but maybe more informatively, is to look at

998
01:39:34.280 --> 01:39:38.199
Xiaqing Li: that the the components along each direction.

999
01:39:38.250 --> 01:39:47.030
Xiaqing Li: so basically what is most useful is so here for the coordinates the beam, just a

1000
01:39:47.060 --> 01:39:52.279
Xiaqing Li: propagate along X access from the original pond. Here and

1001
01:39:52.780 --> 01:40:05.460
Xiaqing Li: in the area between the posts, we expect a pretty uniform B field along the Z direction. So what is most useful. Here is the busy components

1002
01:40:07.250 --> 01:40:11.900
Xiaqing Li: within this area, which is mostly the where the Scatter Chamber is.

1003
01:40:12.030 --> 01:40:18.319
Xiaqing Li: and we can see this uniform distribution. So X here

1004
01:40:19.160 --> 01:40:22.910
Xiaqing Li: basically between around 50 to

1005
01:40:23.680 --> 01:40:32.610
Xiaqing Li: 70. it's the uniform area, and we have. We will have a the field around one

1006
01:40:33.120 --> 01:40:34.679
Xiaqing Li: 3, 5 Tesla

1007
01:40:34.710 --> 01:40:36.459
Xiaqing Li: you using the current.

1008
01:40:36.590 --> 01:40:42.559
Xiaqing Li: This on, and also here is the B Z component, allow. Why.

1009
01:40:44.560 --> 01:40:46.999
Xiaqing Li: yeah. Here this gap is

1010
01:40:47.130 --> 01:40:55.679
Xiaqing Li: representing the returning yok area here and here's and we can see

1011
01:40:56.080 --> 01:41:00.449
Xiaqing Li: platform here. This is between the gap.

1012
01:41:00.510 --> 01:41:02.070
Xiaqing Li: Oh, i'm sorry.

1013
01:41:02.180 --> 01:41:05.209
Xiaqing Li: The gap between the posts

1014
01:41:05.260 --> 01:41:07.029
Xiaqing Li: where we have this

1015
01:41:08.960 --> 01:41:10.010
Xiaqing Li: 8

1016
01:41:10.370 --> 01:41:28.160
Xiaqing Li: centimeter on ice and meter area, and then it drops firstly and then goes to 0. So this 2 plus on the right hand side upper corner is the the X and y components. This is just to make sure that

1017
01:41:28.220 --> 01:41:29.449
Xiaqing Li: they have the

1018
01:41:29.610 --> 01:41:33.319
Xiaqing Li: now value in this area.

1019
01:41:33.430 --> 01:41:34.719
Xiaqing Li: So

1020
01:41:35.470 --> 01:41:44.949
Xiaqing Li: yeah, so I I guess on the next talk by that. But he will provide another 2 depot. So I just didn't include that here.

1021
01:41:46.580 --> 01:41:47.790
Xiaqing Li: yeah, Any common

1022
01:41:48.420 --> 01:41:49.880
Xiaqing Li: bye, Ernie?

1023
01:41:56.190 --> 01:41:57.889
Xiaqing Li: you?

1024
01:41:58.400 --> 01:42:01.599
SBU CFNS: Yeah, I think that's fine.

1025
01:42:01.740 --> 01:42:02.410
That's

1026
01:42:02.950 --> 01:42:07.079
Xiaqing Li: I think Ernie is maybe seeing something that he muted.

1027
01:42:07.100 --> 01:42:08.869
SBU CFNS: Can you hear us?

1028
01:42:08.890 --> 01:42:10.050
Xiaqing Li: Yes, I can.

1029
01:42:10.320 --> 01:42:21.429
Ernie I: Oh, sorry I was muted. Okay. So there's an angle here, and that's to be expected in a C magnet. But we can do a trick down the bottom, where we put a a slight per cell gap.

1030
01:42:21.620 --> 01:42:26.709
Ernie I: and it acts like a field homogenizer, so it would straighten this out.

1031
01:42:26.980 --> 01:42:30.599
Xiaqing Li: so actually, what happened here currently is.

1032
01:42:30.810 --> 01:42:36.319
Xiaqing Li: I I think Chris just moved these 2 coils towards the center by

1033
01:42:36.690 --> 01:42:38.889
Xiaqing Li: point. 5

1034
01:42:39.650 --> 01:42:56.419
Xiaqing Li: Cindy met her on each a sorry from 5 on each each side, but in order to separate the coils from the return from the side York but I guess in the end we will have some paddle

1035
01:42:56.520 --> 01:43:03.220
Xiaqing Li: between as you previously did for the Charles Magnet.

1036
01:43:07.460 --> 01:43:18.169
Ernie I: I remember. That's the way to improve the uniform. Yeah, the Delta P. Over B in this, in that good field in the center axis there. Yeah. So so to get but his

1037
01:43:18.590 --> 01:43:28.900
Ernie I: this yeah, it'll get rid of that that and that slope there across the Pole Gap. So okay, nice work.

1038
01:43:29.120 --> 01:43:33.419
Xiaqing Li: and that's the last slide of my presentation

1039
01:43:36.680 --> 01:43:38.739
Xiaqing Li: any question and common.

1040
01:43:38.800 --> 01:43:44.660
Ernie I: So at this point, if we feed you back geometry, you could put it back in and get a very good result quickly.

1041
01:43:44.770 --> 01:43:53.079
Ernie I: Okay, do you want us to give us? Give you back the coils with a break in on it? Looks like there's a break in these coils.

1042
01:43:53.810 --> 01:44:10.129
Xiaqing Li: you mean this break. No, that's not the real physical break. That's just the interface that. Just stand for this.

1043
01:44:10.160 --> 01:44:20.609
Xiaqing Li: yeah, I understand what they are saying. But it looks like I don't necessarily need that gap in the current setup.

1044
01:44:20.660 --> 01:44:21.639
Xiaqing Li: So

1045
01:44:22.340 --> 01:44:26.550
Xiaqing Li: I just make like inter like cross-

1046
01:44:26.820 --> 01:44:31.040
Xiaqing Li: between whatever plan that can give me this

1047
01:44:31.180 --> 01:44:34.149
Xiaqing Li: triangle here.

1048
01:44:37.060 --> 01:44:37.790
Ernie I: Thank you.

1049
01:44:41.060 --> 01:44:44.409
Xiaqing Li: Oh, sorry. It's not try and go. It's rectangular. Actually. Yeah.

1050
01:44:48.360 --> 01:44:50.019
SBU CFNS: Other questions for touching

1051
01:44:54.610 --> 01:44:55.460
It's not

1052
01:44:56.650 --> 01:45:10.730
Ernie I: so the comment will be basically when you fill in that back leg. The this this steel, will it'll make it more uniform, and it also all the all the fields I see in this thing look totally respectable for carbon steel.

1053
01:45:10.850 --> 01:45:16.759
Ernie I: It didn't in saturation, and anything else. So I would. I would bet this field bag that this magnet will be

1054
01:45:16.780 --> 01:45:18.440
Ernie I: pretty reproducible

1055
01:45:18.730 --> 01:45:20.769
Ernie I: at any current level.

1056
01:45:22.290 --> 01:45:25.980
SBU CFNS: Just make sure I understand what this conversation about

1057
01:45:26.580 --> 01:45:30.290
SBU CFNS: the the slope that you show in the middle plot on the right

1058
01:45:30.570 --> 01:45:34.790
SBU CFNS: that you pointed out right. That that's obviously that's not in the

1059
01:45:35.330 --> 01:45:38.660
Ernie I: It's not. It's a cost. It's across the gap.

1060
01:45:38.930 --> 01:45:42.060
SBU CFNS: It's it's in the steel, right?

1061
01:45:42.160 --> 01:45:58.289
Ernie I: Oh, is that okay? Okay. So the one across? Okay. So I can't see we'd have to blow that up and see Delta B over B, and that that middle section, and that would have that slope I would guarantee you. I think you can see a little a little tiny kick in it.

1062
01:45:58.320 --> 01:46:02.400
Ernie I: It's it's gonna have a slope one way or the other, just because

1063
01:46:02.860 --> 01:46:07.170
Ernie I: the field link. So what happens in a c magnet is the field length is

1064
01:46:07.390 --> 01:46:08.269
Ernie I: different.

1065
01:46:08.300 --> 01:46:16.419
Ernie I: for the tracks on the in on this versus the outside, and it's just the losses across the the the the thing.

1066
01:46:16.740 --> 01:46:18.300
Ernie I: So you end up with

1067
01:46:18.780 --> 01:46:22.310
Ernie I: less field out here, and a stronger field in here

1068
01:46:22.450 --> 01:46:23.660
Ernie I: exaggerated.

1069
01:46:23.830 --> 01:46:28.149
SBU CFNS: So I had thought the point the reason you were pointing out that that

1070
01:46:28.400 --> 01:46:47.849
SBU CFNS: shape in the I I thought you were saying is Well, if you make that flatter, then the peak, you know the the the highest field you get the closest you get to saturate. The steel is at the end of that slope. You you say, if we've been, you won't have that peak anymore. But I see now.

1071
01:46:47.860 --> 01:46:50.140
Ernie I: but this thing will also go twice as high.

1072
01:46:50.670 --> 01:47:06.850
SBU CFNS: you know. You could go twice as high with before you saturated, so i'm not worried about it at all. But the saturation, you know, in this model the saturation is basically at at like minus 12 centimeters on that plot. That's that's the sharpest part of this thing. Yeah, that's gonna go away. Yeah.

1073
01:47:06.940 --> 01:47:08.260
SBU CFNS: all right, Thank you.

1074
01:47:11.310 --> 01:47:13.960
SBU CFNS: And if there are no further questions.

1075
01:47:14.800 --> 01:47:19.599
Ernie I: I yeah, I just want to apologize. I haven't reviewed any of this stuff in

1076
01:47:19.740 --> 01:47:27.300
Ernie I: before, but i'm just looking at it now, so i'm just saying that this is fairly straightforward magnet, and I don't see any issues here

1077
01:47:27.950 --> 01:47:29.449
Ernie I: to fabricate this.

1078
01:47:31.190 --> 01:47:33.340
Ernie I: and her work is nice. It's good.

1079
01:47:33.380 --> 01:47:34.380
Ernie I: good Saxon.

1080
01:47:37.000 --> 01:47:37.789
SBU CFNS: all right.

1081
01:47:38.170 --> 01:47:42.309
SBU CFNS: If there are no further comments. Then let's Thank you.

1082
01:47:42.510 --> 01:47:43.269
Ernie I: Thanks.

1083
01:47:43.550 --> 01:47:45.849
SBU CFNS: And headed over to

1084
01:47:49.600 --> 01:47:51.170
SBU CFNS: where it's control on

1085
01:47:57.550 --> 01:47:59.209
so far.

1086
01:48:04.070 --> 01:48:05.070
Thank you.

1087
01:48:12.740 --> 01:48:13.290
This is

1088
01:48:28.330 --> 01:48:28.990
what I see.

1089
01:48:38.930 --> 01:48:40.609
SBU CFNS: Okay.

1090
01:48:42.160 --> 01:48:44.909
SBU CFNS: you have to we actually have to share a

1091
01:48:45.700 --> 01:48:46.519
let me.

1092
01:48:52.040 --> 01:48:55.090
SBU CFNS: I do

1093
01:49:02.840 --> 01:49:04.209
SBU CFNS: it would just oh, that's me

1094
01:49:06.220 --> 01:49:10.079
SBU CFNS: that you that's me.

1095
01:49:10.840 --> 01:49:12.309
yeah.

1096
01:49:17.160 --> 01:49:20.400
SBU CFNS: Are You clicking buttons.

1097
01:49:23.080 --> 01:49:25.950
SBU CFNS: Oh, it's because it's full. I get it all right.

1098
01:49:29.410 --> 01:49:40.670
SBU CFNS: but that does that when you drive same premium. No, no; but the the full screen when you full screen safari makes a separate window, because

1099
01:49:40.810 --> 01:49:47.280
SBU CFNS: it costs fairly by easy, but it couldn't be good. Interoperability is overrated. We you prefer to make it

1100
01:49:47.880 --> 01:49:48.830
SBU CFNS: this book.

1101
01:49:49.400 --> 01:49:50.150
Alright.

1102
01:49:57.740 --> 01:50:00.750
SBU CFNS: How did I do that?

1103
01:50:04.480 --> 01:50:05.260
SBU CFNS: Hi, there

1104
01:50:05.430 --> 01:50:07.320
SBU CFNS: it's too fast. I

1105
01:50:08.530 --> 01:50:09.599
SBU CFNS: hi

1106
01:50:09.740 --> 01:50:12.029
that.

1107
01:50:12.880 --> 01:50:15.719
SBU CFNS: Okay, and

1108
01:50:16.630 --> 01:50:19.010
SBU CFNS: you may have to click up in the window over time.

1109
01:50:21.050 --> 01:50:24.639
SBU CFNS: Yeah.

1110
01:50:28.810 --> 01:50:29.820
SBU CFNS: Okay.

1111
01:50:31.500 --> 01:50:35.940
SBU CFNS: Okay. So i'm going to repeat a lot of things that I've said in the making. So

1112
01:50:36.070 --> 01:50:42.930
SBU CFNS: I think you've never been in any of these meetings. So it's all for your

1113
01:50:43.440 --> 01:50:51.059
SBU CFNS: Okay. So this answer is Rawson's question. It's why we don't need the whole in the back end of the dipole magnet

1114
01:50:51.240 --> 01:50:55.429
SBU CFNS: is because even when we're at the low energy.

1115
01:50:55.900 --> 01:51:01.130
SBU CFNS: it's the laser work, which is the laser button to it. It's really like, okay.

1116
01:51:01.370 --> 01:51:02.219
SBU CFNS: So

1117
01:51:03.240 --> 01:51:05.369
SBU CFNS: with 31, and maybe beam

1118
01:51:05.700 --> 01:51:07.750
SBU CFNS: and

1119
01:51:08.230 --> 01:51:12.099
SBU CFNS: the nominal field for 11 M. A. V. Positrons

1120
01:51:12.230 --> 01:51:14.930
SBU CFNS: the elastic events look like this.

1121
01:51:15.470 --> 01:51:16.630
SBU CFNS: and they

1122
01:51:17.150 --> 01:51:21.390
SBU CFNS: effectively don't make it out any hole. We put it the back.

1123
01:51:21.520 --> 01:51:26.870
SBU CFNS: and we don't want to make calls. This is, basically take up the entire.

1124
01:51:28.090 --> 01:51:31.540
SBU CFNS: That is.

1125
01:51:31.570 --> 01:51:33.400
SBU CFNS: yeah, okay, fine.

1126
01:51:35.100 --> 01:51:48.609
SBU CFNS: I could have done it. I did it for the whole. So so for the positron, we could dig a pretty wide, all right, and you destroy the management uniform. I mean

1127
01:51:48.810 --> 01:51:50.289
SBU CFNS: to to no end.

1128
01:51:50.530 --> 01:51:51.450
SBU CFNS: Okay.

1129
01:51:52.920 --> 01:51:53.840
SBU CFNS: So

1130
01:51:54.420 --> 01:51:58.479
SBU CFNS: the the whole point is that we don't need the

1131
01:51:58.570 --> 01:52:04.300
SBU CFNS: poll in the back of the yo, so we forget about it. We terminate the vacuum chamber

1132
01:52:04.570 --> 01:52:06.240
SBU CFNS: internally

1133
01:52:06.270 --> 01:52:08.709
SBU CFNS: and make the back yolk solid.

1134
01:52:08.730 --> 01:52:10.870
SBU CFNS: So this is the design.

1135
01:52:11.000 --> 01:52:14.000
SBU CFNS: as Chris did it just recently.

1136
01:52:14.110 --> 01:52:16.709
SBU CFNS: and he's sent this around

1137
01:52:16.800 --> 01:52:19.170
SBU CFNS: but it has

1138
01:52:19.620 --> 01:52:21.840
SBU CFNS: a little bit too much detail.

1139
01:52:22.430 --> 01:52:28.670
SBU CFNS: namely, it has bolt holes and these pins for alignment

1140
01:52:28.950 --> 01:52:30.590
SBU CFNS: and

1141
01:52:31.450 --> 01:52:34.840
SBU CFNS: and she said she couldn't do a big old map.

1142
01:52:35.390 --> 01:52:36.559
SBU CFNS: and they

1143
01:52:37.030 --> 01:52:48.560
SBU CFNS: yeah, we we always make up dumbed up models of these. Chris knows how to do it. He does it all the time. Yeah. So we need to get rid of the the all the little details.

1144
01:52:48.660 --> 01:52:59.529
SBU CFNS: the other thing that I would like to say, because you saw the the field track or the particle trajectories in the previous slide.

1145
01:52:59.580 --> 01:53:01.689
SBU CFNS: I would make this

1146
01:53:01.780 --> 01:53:06.649
SBU CFNS: edge go out further, and terminate here

1147
01:53:07.190 --> 01:53:10.459
SBU CFNS: in the gap between the coils and the magnet.

1148
01:53:11.400 --> 01:53:18.629
SBU CFNS: just so that, and then we could even fill this volume with some lead sheet or something.

1149
01:53:18.830 --> 01:53:19.809
SBU CFNS: It's all there.

1150
01:53:19.840 --> 01:53:21.150
SBU CFNS: Reduce back

1151
01:53:21.800 --> 01:53:23.709
also 150 min.

1152
01:53:24.360 --> 01:53:26.420
SBU CFNS: How do you?

1153
01:53:28.580 --> 01:53:29.340
SBU CFNS: Yeah.

1154
01:53:32.190 --> 01:53:34.939
SBU CFNS: Where you credit 9 you can leave for, too. No.

1155
01:53:36.390 --> 01:53:38.600
SBU CFNS: So you're saying you've got to extend

1156
01:53:38.840 --> 01:53:40.910
SBU CFNS: the diagonal part

1157
01:53:40.940 --> 01:53:41.780
further

1158
01:53:42.320 --> 01:53:45.349
SBU CFNS: that way to the right.

1159
01:53:45.680 --> 01:53:49.789
SBU CFNS: They they will have less holiday with you. Get back couple of in the right.

1160
01:53:49.890 --> 01:53:55.229
SBU CFNS: and you, on suggesting pulling this down as well.

1161
01:53:56.970 --> 01:53:57.800
SBU CFNS: Okay.

1162
01:54:01.810 --> 01:54:04.829
SBU CFNS: So this is. So you use that and not like

1163
01:54:04.940 --> 01:54:06.389
or something later.

1164
01:54:07.530 --> 01:54:08.300
I don't know

1165
01:54:09.430 --> 01:54:10.829
I haven't really thought of it.

1166
01:54:25.500 --> 01:54:29.099
SBU CFNS: Which which the top

1167
01:54:29.910 --> 01:54:31.339
trying to go back. I'm sorry.

1168
01:54:37.870 --> 01:54:38.610
SBU CFNS: No.

1169
01:54:39.450 --> 01:54:41.690
SBU CFNS: So this this should be extended by

1170
01:54:42.500 --> 01:54:45.629
SBU CFNS: I mean the jam took 45 degrees.

1171
01:54:46.190 --> 01:54:49.690
SBU CFNS: They more like 30 degrees.

1172
01:54:50.950 --> 01:54:54.510
SBU CFNS: No, they're not to scale.

1173
01:54:55.980 --> 01:54:59.059
SBU CFNS: But you see the the slope of the

1174
01:54:59.920 --> 01:55:02.240
SBU CFNS: of default essence.

1175
01:55:02.370 --> 01:55:03.980
SBU CFNS: Okay, okay.

1176
01:55:05.270 --> 01:55:07.410
So you want the exit. But basically the

1177
01:55:07.550 --> 01:55:13.789
SBU CFNS: that Absolutely. Yeah, we're close to gems. Yeah.

1178
01:55:14.410 --> 01:55:15.400
makes sense.

1179
01:55:15.630 --> 01:55:18.010
SBU CFNS: Chris: If

1180
01:55:18.660 --> 01:55:20.460
Christopher J Vidal: so, that

1181
01:55:21.820 --> 01:55:23.549
Christopher J Vidal: I'm: sorry. What's that? There.

1182
01:55:24.000 --> 01:55:26.670
SBU CFNS: Well, they want this except

1183
01:55:26.990 --> 01:55:33.429
Christopher J Vidal: actually, can you see the the laser? Okay? So they want this

1184
01:55:34.110 --> 01:55:42.739
SBU CFNS: to be parallel to the jams and and and to raise and back and further up and as close as possible to the jams.

1185
01:55:43.260 --> 01:55:44.830
Christopher J Vidal: Okay, I can look at that.

1186
01:55:45.040 --> 01:55:45.750
SBU CFNS: Yeah.

1187
01:55:51.500 --> 01:55:52.139
Okay.

1188
01:55:52.160 --> 01:55:52.840
SBU CFNS: Okay.

1189
01:55:53.240 --> 01:55:56.770
Christopher J Vidal: yeah, right now, it's parallel to that.

1190
01:55:57.300 --> 01:56:00.780
Christopher J Vidal: The the intersection points in the range races that

1191
01:56:01.020 --> 01:56:02.480
Christopher J Vidal: you provided me.

1192
01:56:02.860 --> 01:56:04.920
SBU CFNS: Well, that's what it should be

1193
01:56:05.610 --> 01:56:07.700
SBU CFNS: right, but it should go a little bit higher

1194
01:56:08.770 --> 01:56:16.349
Christopher J Vidal: if it goes, if it goes too much higher. The gems are very close to the top of the

1195
01:56:16.920 --> 01:56:17.910
Christopher J Vidal: the magic.

1196
01:56:18.220 --> 01:56:33.919
Christopher J Vidal: I mean. I can break it up some, but it it's very close. Yeah. Just the vacuum chamber. I understand that I understand that that flange in the top. Yeah, one is up, being pretty close to the gems. At 1 point

1197
01:56:35.010 --> 01:56:42.290
SBU CFNS: we want it to be as close to the gems as possible.

1198
01:56:43.140 --> 01:56:50.679
Christopher J Vidal: What what price your organization here and parallel to the phone. Call you You're You're looking at this being below

1199
01:56:50.820 --> 01:56:54.130
Christopher J Vidal: here, but actually the the edge of the gym

1200
01:56:54.280 --> 01:56:55.170
Christopher J Vidal: is.

1201
01:56:56.630 --> 01:57:04.789
Christopher J Vidal: you know, like here. So it where it is at the edge of the gym, which is like where this inner wall is. It's very close.

1202
01:57:04.890 --> 01:57:06.860
SBU CFNS: Oh, oh, okay, okay.

1203
01:57:09.720 --> 01:57:14.520
SBU CFNS: Oh, that's right. This this is only 9 cm.

1204
01:57:15.030 --> 01:57:16.740
SBU CFNS: Why.

1205
01:57:17.310 --> 01:57:22.049
SBU CFNS: Where is the gems are much wider than that, so they can go

1206
01:57:22.080 --> 01:57:24.540
SBU CFNS: below the surface of the you.

1207
01:57:27.160 --> 01:57:29.700
SBU CFNS: Okay, Anyway, we'll we'll look at that.

1208
01:57:30.500 --> 01:57:35.899
SBU CFNS: The other picture was misleading because we don't see the the chamber. Yeah, you know.

1209
01:57:39.520 --> 01:57:41.660
SBU CFNS: I must write entirely. Follow this.

1210
01:57:41.820 --> 01:57:48.990
SBU CFNS: But in this picture the vacuum chamber does not extend above the

1211
01:57:49.630 --> 01:57:50.610
and

1212
01:57:51.020 --> 01:57:52.630
SBU CFNS: if the gyms

1213
01:57:53.080 --> 01:58:00.889
SBU CFNS: and the gems can go down as to be parallel to them. So that has to go off to be parallel to the gems. Yeah.

1214
01:58:02.430 --> 01:58:11.029
SBU CFNS: it's it's the focus. One: yeah, yeah. And this has to go up to me. Yeah, it seems like the focus point is already very close.

1215
01:58:12.050 --> 01:58:17.470
SBU CFNS: Okay. So yeah, so the yoke is already kind of interfering.

1216
01:58:17.620 --> 01:58:18.649
SBU CFNS: So this is

1217
01:58:18.870 --> 01:58:19.530
Oh.

1218
01:58:20.210 --> 01:58:23.829
SBU CFNS: mechanically unable to support the Jen's.

1219
01:58:27.490 --> 01:58:28.910
What's that next line?

1220
01:58:29.900 --> 01:58:31.019
SBU CFNS: That's

1221
01:58:31.200 --> 01:58:33.619
SBU CFNS: where I calculated the accent

1222
01:58:34.690 --> 01:58:36.690
SBU CFNS: of the plan to us.

1223
01:58:37.090 --> 01:58:40.660
SBU CFNS: Oh, that's great. Yeah, it's great. I didn't draw it at an angle.

1224
01:58:44.350 --> 01:58:47.119
SBU CFNS: Well, actually, it's a

1225
01:58:47.380 --> 01:58:48.840
SBU CFNS: where is this thing?

1226
01:58:49.140 --> 01:58:56.159
SBU CFNS: It was for an old drawing of the vacuum chamber, where they exit was mostly vertical.

1227
01:58:57.330 --> 01:58:58.799
SBU CFNS: Oh.

1228
01:59:18.960 --> 01:59:19.860
questions!

1229
01:59:20.240 --> 01:59:22.170
But you can still have it.

1230
01:59:22.330 --> 01:59:26.709
SBU CFNS: You can have it parallel to the playing of the downs.

1231
01:59:27.460 --> 01:59:31.790
SBU CFNS: which is in the

1232
01:59:32.390 --> 01:59:38.719
SBU CFNS: we

1233
01:59:41.100 --> 01:59:43.439
SBU CFNS: and this doesn't go.

1234
01:59:43.690 --> 01:59:53.379
Christopher J Vidal: No, don't. Forget that if you, if you increase the height of that chamber

1235
01:59:53.810 --> 01:59:58.110
Christopher J Vidal: and and make the pledge parallel to the gems.

1236
01:59:58.260 --> 02:00:07.550
Christopher J Vidal: then you you also have to deal with the the plus, or minus 2 degree, or even if it's the 1 point, 6 degree dispersion of the

1237
02:00:07.590 --> 02:00:12.350
Christopher J Vidal: the scattering. The further up you go, the more you're going to interfere with that

1238
02:00:16.910 --> 02:00:20.470
SBU CFNS: Both patches right. You don't have that.

1239
02:00:20.700 --> 02:00:26.490
SBU CFNS: There, there actually is a window there, that's there's a little window

1240
02:00:26.590 --> 02:00:29.630
SBU CFNS: that that's the point. There should not be even okay.

1241
02:00:29.830 --> 02:00:34.110
SBU CFNS: It should be only a window.

1242
02:00:34.610 --> 02:00:39.240
SBU CFNS: but that doesn't mean that the

1243
02:00:52.930 --> 02:00:55.330
SBU CFNS: Chris subjected to flattering it.

1244
02:00:55.540 --> 02:00:57.070
SBU CFNS: I suggested that.

1245
02:00:59.570 --> 02:01:01.259
SBU CFNS: I think we

1246
02:01:01.350 --> 02:01:02.139
SBU CFNS: Well.

1247
02:01:02.450 --> 02:01:03.610
SBU CFNS: let's let's

1248
02:01:04.220 --> 02:01:07.139
SBU CFNS: look at it when we get the

1249
02:01:07.200 --> 02:01:08.969
SBU CFNS: the real drawing

1250
02:01:09.360 --> 02:01:12.480
SBU CFNS: and the actual rate races.

1251
02:01:12.750 --> 02:01:23.300
Christopher J Vidal: That's that's the bottom line to me, Doug is. We need the actual ray traces to all this. All this is academic until we have that, and see

1252
02:01:23.330 --> 02:01:25.149
Christopher J Vidal: what the minimum

1253
02:01:25.230 --> 02:01:30.380
SBU CFNS: span of the chamber can be. And you've already made this bigger.

1254
02:01:31.470 --> 02:01:35.860
SBU CFNS: The this lunch is bigger than the one that I had earlier

1255
02:01:35.910 --> 02:01:37.449
Christopher J Vidal: correct right?

1256
02:01:37.510 --> 02:01:38.510
SBU CFNS: So

1257
02:01:38.780 --> 02:01:42.249
SBU CFNS: this has got less problem.

1258
02:01:42.820 --> 02:01:51.420
SBU CFNS: What what do you mean by the actual?

1259
02:01:51.760 --> 02:01:52.700
SBU CFNS: No.

1260
02:01:53.320 --> 02:02:00.500
SBU CFNS: there we haven't done the field map where the Yok has been called in. Okay, that's what we are. Yeah.

1261
02:02:00.710 --> 02:02:09.329
SBU CFNS: Because because Chris sent around this line with with all these little screw holes in it which answers Maxwell all over.

1262
02:02:09.980 --> 02:02:12.570
SBU CFNS: Oh.

1263
02:02:28.160 --> 02:02:28.870
yeah.

1264
02:02:29.670 --> 02:02:30.469
SBU CFNS: Well.

1265
02:02:31.760 --> 02:02:36.560
SBU CFNS: yeah, I think Chris is designing the support for the javascript.

1266
02:02:36.880 --> 02:02:37.660
Yeah, sure.

1267
02:02:38.090 --> 02:02:40.419
SBU CFNS: So there is room to

1268
02:02:41.020 --> 02:02:44.590
SBU CFNS: real line. But they should match the focal point. Now.

1269
02:02:44.660 --> 02:02:53.569
SBU CFNS: I don't the phone planning to nation, maybe at 40 or 41 degrees. No, not that.

1270
02:02:55.570 --> 02:02:57.260
Oh, okay.

1271
02:02:59.060 --> 02:03:03.549
SBU CFNS: this this is an

1272
02:03:03.750 --> 02:03:09.830
SBU CFNS: look at a one to one scale, you know.

1273
02:03:10.260 --> 02:03:13.800
SBU CFNS: Yeah, it's closer to

1274
02:03:17.130 --> 02:03:17.840
bye

1275
02:03:18.730 --> 02:03:26.940
SBU CFNS: in the rough traces that I have. I have the focal plane that about 33 degrees.

1276
02:03:27.920 --> 02:03:36.160
Christopher J Vidal: Sorry. What did you say, Chris? 33 degrees 33. Yes, that's in the rough retraces that I have from before.

1277
02:03:36.190 --> 02:03:40.599
SBU CFNS: Yeah, that's from heralds right.

1278
02:03:40.770 --> 02:03:43.200
SBU CFNS: We don't have the new.

1279
02:03:45.790 --> 02:03:51.950
SBU CFNS: So when you all have the exit plan.

1280
02:03:52.200 --> 02:03:56.800
SBU CFNS: then the

1281
02:03:59.920 --> 02:04:01.510
SBU CFNS: sorry you Boston

1282
02:04:02.050 --> 02:04:03.080
SBU CFNS: there you!

1283
02:04:03.270 --> 02:04:20.419
SBU CFNS: So we want the

1284
02:04:28.380 --> 02:04:35.049
SBU CFNS: It's not the rectangle. It's a yeah, yeah.

1285
02:04:35.490 --> 02:04:36.340
SBU CFNS: What it is?

1286
02:04:36.470 --> 02:04:37.920
SBU CFNS: Yeah, it's profitable.

1287
02:04:38.040 --> 02:04:39.150
SBU CFNS: Bye.

1288
02:04:40.510 --> 02:04:43.590
SBU CFNS: you want to design a window to be a traffic light.

1289
02:04:45.270 --> 02:04:48.010
SBU CFNS: What is it?

1290
02:04:48.890 --> 02:04:52.010
SBU CFNS: So

1291
02:04:52.050 --> 02:05:04.119
SBU CFNS: the window is actually at Google right now. It doesn't matter

1292
02:05:11.030 --> 02:05:11.800
SBU CFNS: right.

1293
02:05:38.680 --> 02:05:54.010
SBU CFNS: the

1294
02:05:54.280 --> 02:06:02.499
SBU CFNS: Michael, if it's really like. If we really don't make this back in Chamber in 2 pieces, and there's no reason to that. Exit window not to be.

1295
02:06:02.580 --> 02:06:05.230
SBU CFNS: you know. Move so it's always.

1296
02:06:05.350 --> 02:06:06.880
SBU CFNS: I was above the

1297
02:06:07.810 --> 02:06:09.340
SBU CFNS: right. You just

1298
02:06:09.360 --> 02:06:10.969
SBU CFNS: alter we're back

1299
02:06:11.460 --> 02:06:14.190
SBU CFNS: comes out. So you don't have to worry about whether you're

1300
02:06:14.370 --> 02:06:19.070
SBU CFNS: flaring in a way that interrupts those there's no reason to to have it in.

1301
02:06:19.380 --> 02:06:23.239
Christopher J Vidal: I think you will see Ross when I do my presentation.

1302
02:06:23.280 --> 02:06:26.379
Christopher J Vidal: You don't really have the room to do what you're saying.

1303
02:06:26.460 --> 02:06:34.569
Christopher J Vidal: I Here people may be wanting to make a 2 of these chamber. There's not a lot of room in there.

1304
02:06:34.790 --> 02:06:42.369
SBU CFNS: thank you. I mean, Bummer. But

1305
02:06:42.660 --> 02:06:47.269
SBU CFNS: what what is the point of the

1306
02:06:48.070 --> 02:06:53.850
SBU CFNS: All right. Well, this okay, that's the whole point of this is

1307
02:07:00.160 --> 02:07:01.190
SBU CFNS: okay.

1308
02:07:01.280 --> 02:07:02.349
SBU CFNS: So

1309
02:07:02.620 --> 02:07:07.769
SBU CFNS: the object of this was that the particles coming from the

1310
02:07:08.840 --> 02:07:14.329
SBU CFNS: would in the old design. They were plus or minus 2 degrees.

1311
02:07:14.460 --> 02:07:15.380
What is

1312
02:07:15.500 --> 02:07:18.209
SBU CFNS: It's okay. It's it's okay.

1313
02:07:18.750 --> 02:07:23.240
SBU CFNS: Chris has made it bigger now, so it's even larger acceptance.

1314
02:07:27.010 --> 02:07:31.150
SBU CFNS: but the plus or minus 2 degrees

1315
02:07:34.340 --> 02:07:35.429
SBU CFNS: doesn't work.

1316
02:07:36.650 --> 02:07:40.469
SBU CFNS: because this is the 0 degree case.

1317
02:07:41.140 --> 02:07:44.570
SBU CFNS: and then the one degree, case and 2 degree case.

1318
02:07:44.760 --> 02:07:47.250
SBU CFNS: and the 2 degree doesn't get out

1319
02:07:48.000 --> 02:07:49.570
SBU CFNS: because it's the magnet

1320
02:07:49.590 --> 02:07:55.500
SBU CFNS: as effectively. The the inside of the vacuum chamber is 7 7,

1321
02:07:56.300 --> 02:07:59.909
SBU CFNS: so we cannot have plus or minus 2 degrees.

1322
02:08:04.930 --> 02:08:10.820
SBU CFNS: Oh, and that just I was doing it for the 11 Mv. Case, just to show that it's the same.

1323
02:08:12.000 --> 02:08:17.359
SBU CFNS: Now this is what you could do. You could get plus or minus 1.6 degrees.

1324
02:08:18.540 --> 02:08:21.159
SBU CFNS: But I think that's a little tight.

1325
02:08:22.720 --> 02:08:27.109
SBU CFNS: So I I would advocate that we do calculations for 1.5.

1326
02:08:31.950 --> 02:08:38.360
So

1327
02:08:44.070 --> 02:08:47.619
SBU CFNS: all right.

1328
02:08:48.730 --> 02:08:55.240
SBU CFNS: it will not call us.

1329
02:08:55.290 --> 02:09:00.170
SBU CFNS: yes.

1330
02:09:02.330 --> 02:09:13.429
SBU CFNS: because of the way. Yeah, yeah, that's right.

1331
02:09:14.790 --> 02:09:15.370
Yeah.

1332
02:09:15.540 --> 02:09:16.639
SBU CFNS: Yeah. Yeah.

1333
02:09:19.840 --> 02:09:22.230
SBU CFNS: So

1334
02:09:31.110 --> 02:09:31.969
I don't know.

1335
02:09:33.660 --> 02:09:34.429
I

1336
02:09:35.940 --> 02:09:39.650
SBU CFNS: Okay. So you guys have unlimited money.

1337
02:09:39.850 --> 02:09:43.860
SBU CFNS: Well, you're going to edm the collimator, anyway. So

1338
02:09:44.190 --> 02:09:46.760
SBU CFNS: doesn't make any difference what shape. It is

1339
02:09:50.130 --> 02:09:56.190
Richard G Milner: also unlimited time by the sound of it.

1340
02:09:57.310 --> 02:09:59.370
SBU CFNS: Okay, so I would

1341
02:09:59.480 --> 02:10:02.679
SBU CFNS: argue for 1 point, 5 degrees for calculate

1342
02:10:02.800 --> 02:10:08.380
SBU CFNS: nations purposes. This just is some more details at

1343
02:10:09.190 --> 02:10:11.980
SBU CFNS: this laser is really slow. Yeah.

1344
02:10:12.910 --> 02:10:16.760
SBU CFNS: yeah, 0

1345
02:10:16.820 --> 02:10:24.660
SBU CFNS: degrees point, 2.5, 1, 1 point, 5 and 1.6,

1346
02:10:25.730 --> 02:10:32.180
SBU CFNS: and what it also indicates is that you're not going to have Polar angle resolution.

1347
02:10:32.210 --> 02:10:34.450
SBU CFNS: So in the

1348
02:10:35.800 --> 02:10:44.009
SBU CFNS: because you got too much.

1349
02:10:45.780 --> 02:10:46.490
Yeah.

1350
02:10:46.660 --> 02:10:47.469
SBU CFNS: so

1351
02:10:48.740 --> 02:10:57.749
SBU CFNS: it's gonna affect the Polar Angle resolution.

1352
02:10:57.810 --> 02:11:02.279
SBU CFNS: It's it's it's the biggest

1353
02:11:04.640 --> 02:11:05.340
SBU CFNS: yeah.

1354
02:11:09.160 --> 02:11:12.820
SBU CFNS: in fact, that we need the

1355
02:11:12.930 --> 02:11:16.279
and this is the combination of the

1356
02:11:20.200 --> 02:11:20.830
Yeah.

1357
02:11:21.060 --> 02:11:27.299
SBU CFNS: Okay. So I thought a little bit about magnet calibration. But I didn't think of lowering the

1358
02:11:31.420 --> 02:11:38.300
SBU CFNS: I'm always doing it for fixed energy. Okay, so with 31, I may be you can use that as a calibration point

1359
02:11:38.640 --> 02:11:47.409
SBU CFNS: with molar at with the 20 degree detector. The molar is in 6 me which I think is reasonable. You could do it.

1360
02:11:47.910 --> 02:11:53.870
SBU CFNS: the electron arm at 39 degrees. The molar is at 1.4 anything which I think

1361
02:11:54.210 --> 02:11:55.330
SBU CFNS: a little.

1362
02:11:58.950 --> 02:12:03.829
SBU CFNS: You can get it a good.

1363
02:12:04.890 --> 02:12:08.050
The first one is our.

1364
02:12:32.750 --> 02:12:45.299
SBU CFNS: and I mean it might be it's another. this is your business, but you could get like you if you have something that just like on the top of the of the

1365
02:12:50.790 --> 02:12:52.690
SBU CFNS: in the

1366
02:12:53.040 --> 02:12:54.250
Yeah.

1367
02:12:54.410 --> 02:12:57.570
SBU CFNS: Yeah.

1368
02:12:57.650 --> 02:13:03.120
SBU CFNS: they they report the energy to 100 bills. Right, you know. It's 49.9, 29.8

1369
02:13:08.670 --> 02:13:09.269
now.

1370
02:13:11.040 --> 02:13:13.340
SBU CFNS: Anyway, I

1371
02:13:13.800 --> 02:13:14.540
SBU CFNS: I don't.

1372
02:13:14.820 --> 02:13:15.559
So.

1373
02:13:17.210 --> 02:13:18.130
SBU CFNS: Yeah.

1374
02:13:18.220 --> 02:13:19.739
SBU CFNS: And this is Jesse.

1375
02:13:19.890 --> 02:13:21.460
SBU CFNS: What?

1376
02:13:21.530 --> 02:13:23.699
SBU CFNS: it already? So

1377
02:13:26.150 --> 02:13:28.120
SBU CFNS: okay, Not as well as I had.

1378
02:13:36.810 --> 02:13:40.990
SBU CFNS: It's not all. Oh, it's Chris.

1379
02:13:43.640 --> 02:13:46.829
SBU CFNS: I don't know. I accept this. I will force you to

1380
02:13:48.630 --> 02:13:49.969
right now

1381
02:13:50.370 --> 02:13:51.559
a state.

1382
02:13:52.510 --> 02:13:57.540
SBU CFNS: I think I

1383
02:13:57.740 --> 02:13:58.559
Christopher J Vidal: yeah.

1384
02:13:58.940 --> 02:13:59.809
SBU CFNS: you're up

1385
02:14:02.080 --> 02:14:04.629
Christopher J Vidal: hopefully. This will be short.

1386
02:14:05.130 --> 02:14:08.050
Christopher J Vidal: There's still a lot of things that are

1387
02:14:08.180 --> 02:14:13.160
Christopher J Vidal: changing as we speak, and in flux. But i'll try and go through the key points.

1388
02:14:13.600 --> 02:14:15.350
Christopher J Vidal: Oh, can you all see my screen?

1389
02:14:16.080 --> 02:14:16.910
SBU CFNS: Yes.

1390
02:14:17.190 --> 02:14:18.080
Okay.

1391
02:14:21.090 --> 02:14:26.580
Christopher J Vidal: So what we've been working on here on what I've been working on is a simplified table

1392
02:14:26.680 --> 02:14:31.340
Christopher J Vidal: structure that will and i'm trying to make everything common.

1393
02:14:31.520 --> 02:14:41.849
Christopher J Vidal: So there, when you change from 25 to 29 degree configurations it, it you don't have to do

1394
02:14:42.170 --> 02:14:45.759
Christopher J Vidal: or whatnot, and I have a typical

1395
02:14:45.790 --> 02:14:50.209
Christopher J Vidal: struct system that we use plenty of time at Bates

1396
02:14:50.560 --> 02:14:52.620
Christopher J Vidal: and

1397
02:14:52.820 --> 02:15:00.359
Christopher J Vidal: these are positioning struts, and Jennifer for us the Gemstra I have attached to the

1398
02:15:00.480 --> 02:15:05.219
Christopher J Vidal: Dipoles, so that the gems move with the dipoles.

1399
02:15:05.240 --> 02:15:10.439
Christopher J Vidal: say relative to the dipole. Once we figure out where we really want them to be.

1400
02:15:11.170 --> 02:15:19.949
Christopher J Vidal: and I did a chamber port on the on the scattering chamber on the 25 and 39 degrees side.

1401
02:15:20.180 --> 02:15:27.799
Christopher J Vidal: so that rather than changing the chamber, you'll see that in a later slide you can it's join it, and you can flip it.

1402
02:15:27.930 --> 02:15:29.609
Christopher J Vidal: and we use that.

1403
02:15:31.400 --> 02:15:33.810
Christopher J Vidal: So here i'm showing you the

1404
02:15:34.300 --> 02:15:44.469
Christopher J Vidal: the an idea for the position struct for the gems. Now, right now these will do angle and height. I do not have any kind of side to side

1405
02:15:44.530 --> 02:15:50.160
Christopher J Vidal: or front to back built into them. If we need to do that, and I will work forever on it. And

1406
02:15:52.090 --> 02:15:55.430
Christopher J Vidal: put a system in there where we could arrange that.

1407
02:15:55.460 --> 02:16:03.560
Christopher J Vidal: It was my understanding that once we realize where they are going to go, that we can kinda just deal it down with that. And then

1408
02:16:03.640 --> 02:16:06.800
Christopher J Vidal: we're really only concerned with the

1409
02:16:07.120 --> 02:16:08.990
Christopher J Vidal: If that is incorrect.

1410
02:16:09.330 --> 02:16:12.880
Christopher J Vidal: please let me know the work on that.

1411
02:16:13.530 --> 02:16:15.359
Christopher J Vidal: What I also tried to do was

1412
02:16:15.620 --> 02:16:21.210
Christopher J Vidal: the attachments to the channels itself. I tried to make it so that

1413
02:16:21.500 --> 02:16:25.049
Christopher J Vidal: it won't interfere with any cards or cables.

1414
02:16:25.340 --> 02:16:27.449
Christopher J Vidal: or what not, coming off of that.

1415
02:16:27.750 --> 02:16:38.609
Christopher J Vidal: Try to give you a clearance from to be able to do that. I will point out on this slide because of the previous discussion. Talking about the chamber

1416
02:16:39.360 --> 02:16:46.100
Christopher J Vidal: and changing the chamber that you really don't have a lot of room. You can see

1417
02:16:46.219 --> 02:16:49.200
Christopher J Vidal: where the gym sits just above the dipole.

1418
02:16:50.090 --> 02:16:51.800
Christopher J Vidal: there isn't a lot of room

1419
02:16:52.010 --> 02:16:56.100
Christopher J Vidal: for that, and this is another slide that that even better

1420
02:16:58.639 --> 02:17:08.940
Christopher J Vidal: each dipole can be independently positioned with typical struct system that we have used that debates and leveling B I think that this can

1421
02:17:08.990 --> 02:17:15.089
Christopher J Vidal: eliminate the need for a bellows where we attach them because of the

1422
02:17:15.160 --> 02:17:18.430
Christopher J Vidal: profile of the

1423
02:17:18.750 --> 02:17:22.560
Christopher J Vidal: We have to go with a rectangular plan to rectangular chamber.

1424
02:17:22.590 --> 02:17:26.980
Christopher J Vidal: there is nobody that I know that makes

1425
02:17:27.209 --> 02:17:32.119
Christopher J Vidal: so I've limited the use of the bell host. But you basically the the

1426
02:17:32.309 --> 02:17:37.490
Christopher J Vidal: position of the dipole on there is very close to the chamber, and then you use

1427
02:17:37.600 --> 02:17:40.609
Christopher J Vidal: these structs and leveling feet

1428
02:17:40.629 --> 02:17:49.870
Christopher J Vidal: to pull it right into the position you want put together. And then another. Typically, we use is a lock down broad.

1429
02:17:49.910 --> 02:18:05.630
Christopher J Vidal: where, say you have a half 13 rod that goes through a inch and a half or 2 inch hole. That gives you the the freedom of movement. But then it oversized washer on top that once you have it in place you can lock it in place, and there's 2 of those per dipole.

1430
02:18:08.340 --> 02:18:10.360
Christopher J Vidal: what i'm showing here

1431
02:18:10.500 --> 02:18:11.710
Christopher J Vidal: is the

1432
02:18:12.370 --> 02:18:20.640
Christopher J Vidal: port that I talked about that you can flip, and if you could look in closely as an offset outlet to it in a rectangular plan.

1433
02:18:20.790 --> 02:18:23.040
Christopher J Vidal: Rectangular plans with a vacuum seal.

1434
02:18:23.100 --> 02:18:26.369
Christopher J Vidal: So when you're at 25 degrees, you have it

1435
02:18:26.830 --> 02:18:31.859
Christopher J Vidal: pointing so that the out there is that 25 degrees. When you go to 39 degrees.

1436
02:18:31.910 --> 02:18:35.509
Christopher J Vidal: you can just flip it 180 degrees reseal it.

1437
02:18:35.629 --> 02:18:40.760
Christopher J Vidal: So you break the vacuum. See, it will reseal it. And now you're at the 39 degrees

1438
02:18:41.520 --> 02:18:47.300
Christopher J Vidal: and i'm also just showing here where the electromagnet quads and permanent.

1439
02:18:49.980 --> 02:18:57.700
Christopher J Vidal: The permanent magnet was unfortunately, because they have No, they will have to be put on to the

1440
02:18:57.780 --> 02:19:01.719
Christopher J Vidal: chambers for school pieces as they're welded

1441
02:19:02.010 --> 02:19:14.770
Christopher J Vidal: as they're put in place. They will also have their own kind of support system for them, which is will be worked out once we get the anchor points from the company making the what it should not be that difficult to do.

1442
02:19:15.260 --> 02:19:19.050
Christopher J Vidal: I need to also have space for

1443
02:19:19.080 --> 02:19:23.270
Christopher J Vidal: Other elements, such as the position monitors call me

1444
02:19:23.780 --> 02:19:30.209
Christopher J Vidal: and I You have just recently received a a nice diagram from the

1445
02:19:30.240 --> 02:19:32.489
Christopher J Vidal: showing where she would like

1446
02:19:32.520 --> 02:19:38.630
Christopher J Vidal: to be positioning monitors put in place, anyway, and i'm working on putting those in place as we speak.

1447
02:19:40.209 --> 02:19:44.000
Christopher J Vidal: just to get back to some of what Doug was saying.

1448
02:19:44.360 --> 02:19:46.829
Christopher J Vidal: in his presentation. This

1449
02:19:47.120 --> 02:19:48.510
Christopher J Vidal: ray trace

1450
02:19:48.570 --> 02:20:00.630
Christopher J Vidal: is from an original model, and we don't really know the accuracy of it. But you can see what I did was try and make the vacuum chamber so that it does not infringe upon it

1451
02:20:00.720 --> 02:20:10.249
Christopher J Vidal: anywhere. I'm also trying to minimize, and we will refine once we get the new traces where we find this even more to try and minimize the whole

1452
02:20:10.340 --> 02:20:17.020
Christopher J Vidal: size of the Chamber for multiple reasons. One is for better vacuum reasons, and the other is for less deflection.

1453
02:20:17.130 --> 02:20:19.259
Christopher J Vidal: I we did worry about

1454
02:20:19.350 --> 02:20:36.400
Christopher J Vidal: deflection across the large surface area Once a vacuum is pulled on there, and to compensate for that, we'll be putting small bushings on the chamber and small holes through the the magnet that you could put 3 screws through to try and pull it back towards the walls.

1455
02:20:37.100 --> 02:20:38.530
Christopher J Vidal: And again, in this

1456
02:20:38.840 --> 02:20:45.090
Christopher J Vidal: view you can see how very close the the gym is to the top of the the chamber.

1457
02:20:45.210 --> 02:20:50.619
SBU CFNS: So rest. yeah, the in our end of the

1458
02:20:50.640 --> 02:20:54.210
SBU CFNS: factory Channel plan doesn't have to be outside of the

1459
02:20:54.660 --> 02:20:58.279
Christopher J Vidal: I'm: Sorry. Can you speak a couple?

1460
02:20:58.330 --> 02:21:03.940
SBU CFNS: Does the exit window. French have to reside completely outside of the coil.

1461
02:21:04.870 --> 02:21:05.820
Christopher J Vidal: Yes.

1462
02:21:06.430 --> 02:21:10.319
Christopher J Vidal: otherwise it's. It becomes well.

1463
02:21:10.640 --> 02:21:13.939
Christopher J Vidal: It all depends on how difficult you want it to be to bolt it up

1464
02:21:14.150 --> 02:21:23.370
SBU CFNS: if we if we wanted that orientation of that exit plane, the adjacent to that of the gem plane. Oh, i'm sorry you're talking about on on the top.

1465
02:21:23.390 --> 02:21:25.100
Christopher J Vidal: you know.

1466
02:21:25.590 --> 02:21:26.810
Christopher J Vidal: Excuse me, Michael.

1467
02:21:27.560 --> 02:21:29.560
SBU CFNS: you're talking on the top.

1468
02:21:29.570 --> 02:21:48.010
SBU CFNS: Yeah, so I don't let me just show you right here. Can you zoom in on this a little bit? I meant this corner on you if you want this to be already like this, and you need to have a kink or you can.

1469
02:21:48.360 --> 02:22:05.229
SBU CFNS: Yeah, but it has to be outside of the orange core in products. Okay, my finger is this is outside of everything. The jump back would start here, and I can't see your figure. You're on no 1 s 1 s. You want a smaller diameter. Plan what you're saying.

1470
02:22:06.040 --> 02:22:12.910
SBU CFNS: No, I I don't think we need the the inner part of the of the that much.

1471
02:22:12.930 --> 02:22:17.239
SBU CFNS: I there's no checks going through there, but I try to draw a straight line, but I do the black line

1472
02:22:18.140 --> 02:22:31.150
Christopher J Vidal: right again again. This chamber will be optimized. That's what I was saying earlier. This chamber will be optimized. Once we know the the ray traces that

1473
02:22:31.430 --> 02:22:41.369
Christopher J Vidal: and yes, I can. And and again that comes down to a question of of machine ability and money. But I can. I can follow it.

1474
02:22:42.150 --> 02:22:44.089
Christopher J Vidal: you know. Pretty?

1475
02:22:44.160 --> 02:22:46.070
Yeah. So I know those

1476
02:22:46.220 --> 02:22:47.720
those areas.

1477
02:22:48.840 --> 02:22:52.640
SBU CFNS: Yeah, but it's I mean, I don't think that the trajectory is, we change much.

1478
02:22:52.930 --> 02:22:55.569
SBU CFNS: but that means that the method is different from what we decide.

1479
02:22:55.940 --> 02:23:06.300
SBU CFNS: So if the trajectories stay are free where they are at the black Point. Is there a crossroad? We would be outside of the magn. We would be above the magnet and could have

1480
02:23:07.470 --> 02:23:10.780
SBU CFNS: an angle opening which matches the gem.

1481
02:23:11.200 --> 02:23:27.769
Christopher J Vidal: Yeah. And I remember looking at this in in 2 dimension in a 3 dimension. It flares out in the other dimensions also. So yes, that what I would say is that the Chamber is in flux. It is the many iterations of the, and it still needs to be optimized.

1482
02:23:28.160 --> 02:23:38.770
Christopher J Vidal: and it will be optimized. Once we get the new ray traces trying to optimize it without that. It's kind of an academic point. Because

1483
02:23:39.560 --> 02:23:54.129
SBU CFNS: i'll i'll just wind up changing it again afterwards, if you, if you want me to do that based on this rate, for i'm more than happy to do it.

1484
02:23:54.240 --> 02:24:00.419
SBU CFNS: And if you that there's no space now. It would be very largely if something space would appear.

1485
02:24:00.640 --> 02:24:02.890
Christopher J Vidal: but it's

1486
02:24:03.580 --> 02:24:09.730
Christopher J Vidal: in the early time stage. I will always give you something that is, you know, larger than you need.

1487
02:24:10.270 --> 02:24:16.570
Christopher J Vidal: because it's it's easier to take away than that, you know, if I design it, and it's hitting, then

1488
02:24:17.120 --> 02:24:24.840
Christopher J Vidal: it's it's anyway. The answer to your question is, yes, we can rework the chamber

1489
02:24:24.920 --> 02:24:27.039
Christopher J Vidal: and make it more streamlined.

1490
02:24:29.020 --> 02:24:29.819
SBU CFNS: Thank you.

1491
02:24:30.080 --> 02:24:33.949
SBU CFNS: And we got a question on the table here.

1492
02:24:34.100 --> 02:24:39.360
SBU CFNS: Chris the diagonal strut on the bottom of the York.

1493
02:24:39.420 --> 02:24:44.009
SBU CFNS: And is there any reason why it's not vertical, or is it?

1494
02:24:44.350 --> 02:24:53.640
Christopher J Vidal: It could be vertical, but to me it's it. It's perpendicular to the plane that it's supporting. So

1495
02:24:54.520 --> 02:24:56.269
Christopher J Vidal: you know I don't have a

1496
02:24:56.500 --> 02:24:58.650
Christopher J Vidal: problem making it vertical.

1497
02:24:59.510 --> 02:25:13.459
Christopher J Vidal: It doesn't, Really, that's not for position. That's just to me to support that back end. Yeah, it's a 2 force member. So it really doesn't matter, and it's only going to be able to take

1498
02:25:13.640 --> 02:25:14.559
Ernie I: it. It won't.

1499
02:25:14.920 --> 02:25:17.289
Ernie I: It'll only take axial

1500
02:25:17.480 --> 02:25:24.860
Christopher J Vidal: loads, anyway. So all that's really there for is to prevent the magnet from tipping when you're putting it on. And you know.

1501
02:25:24.910 --> 02:25:26.970
SBU CFNS: Yeah, I realized that.

1502
02:25:28.580 --> 02:25:30.130
SBU CFNS: i'll be here to the engineers.

1503
02:25:30.760 --> 02:25:31.650
Yeah.

1504
02:25:32.230 --> 02:25:33.770
Christopher J Vidal: And finally

1505
02:25:33.860 --> 02:25:37.129
Christopher J Vidal: I just wanted to show you. This is so. This is

1506
02:25:37.940 --> 02:25:50.040
Christopher J Vidal: what I'm working on now, which is trying to fit it into the area. And again I've gotten a nice diagram from a where she wants components to be. this is a

1507
02:25:50.170 --> 02:25:51.450
Christopher J Vidal: It's quite a

1508
02:25:51.490 --> 02:25:55.659
Christopher J Vidal: bigger labor that it looks like only because the the model

1509
02:25:56.050 --> 02:26:03.769
Christopher J Vidal: is so massively huge it crashes my computer probably several times a day. But i'm getting to the point where I feel confident

1510
02:26:04.490 --> 02:26:11.019
Christopher J Vidal: in it, and you can see that with the changing of position of some of the elements

1511
02:26:11.320 --> 02:26:16.250
Christopher J Vidal: optimistic that it looks like it's open up a little bit, namely.

1512
02:26:16.480 --> 02:26:17.699
Christopher J Vidal: this element

1513
02:26:18.110 --> 02:26:20.670
Christopher J Vidal: here was formerly

1514
02:26:21.310 --> 02:26:22.670
Christopher J Vidal: in this position.

1515
02:26:22.820 --> 02:26:31.590
Christopher J Vidal: and a bean has told me that they are going to move it back to there. I still need to add a B monitors like it to be monitors

1516
02:26:31.730 --> 02:26:50.350
Christopher J Vidal: and what not in here, and I need to check that. These dimensions are accurate. For my own mind I have a question as to what designates the end of the being dumped, which she gave me. She gave me a dimension to the edge of the beam dump, and I need to know whether that's to

1517
02:26:50.580 --> 02:26:57.619
Christopher J Vidal: a block to a plan to something inside you know what actually constitutes the beat dump itself.

1518
02:26:58.240 --> 02:27:00.929
Christopher J Vidal: and the where that will come into play is

1519
02:27:01.160 --> 02:27:03.800
Christopher J Vidal: how big this stand can be underneath.

1520
02:27:04.420 --> 02:27:05.470
Christopher J Vidal: so

1521
02:27:05.540 --> 02:27:09.310
Christopher J Vidal: the only reason I bring that up is, it is a work in progress. We we're

1522
02:27:09.930 --> 02:27:11.409
Christopher J Vidal: well, we're making

1523
02:27:11.750 --> 02:27:14.419
Christopher J Vidal: advances with it, but it is working progress.

1524
02:27:14.530 --> 02:27:22.610
SBU CFNS: of course I will just be with the room table and our table on the right side to the board.

1525
02:27:28.640 --> 02:27:31.989
Christopher J Vidal: Let me let me go to the let me go to the solidworks model.

1526
02:27:32.680 --> 02:27:35.499
Christopher J Vidal: and we can look at it, Live

1527
02:27:41.940 --> 02:27:46.669
Christopher J Vidal: So from this all of words model. Why assume that this

1528
02:27:46.970 --> 02:27:48.840
Christopher J Vidal: is the inside wall.

1529
02:27:48.870 --> 02:27:52.289
Christopher J Vidal: and I see I gotta pull this back a little bit.

1530
02:27:52.340 --> 02:27:58.709
Christopher J Vidal: No, I I literally just put this.

1531
02:27:58.770 --> 02:27:59.970
Ernie I: I see a stand up.

1532
02:28:00.150 --> 02:28:00.890
Christopher J Vidal: Yeah.

1533
02:28:01.070 --> 02:28:05.710
Richard G Milner: no, it's okay. I've been res resolved this first. I mean, is that

1534
02:28:05.760 --> 02:28:11.000
SBU CFNS: it's. It's not space. It might have to make it little smaller, like

1535
02:28:11.400 --> 02:28:13.630
Christopher J Vidal: correct.

1536
02:28:13.650 --> 02:28:17.059
Christopher J Vidal: Again, i'm giving you the biggest I can, because

1537
02:28:17.120 --> 02:28:22.000
Christopher J Vidal: further on, this also has to support whatever table will be there for shielding.

1538
02:28:23.960 --> 02:28:27.750
Christopher J Vidal: So I mean it looks. The table looks bigger than it needs to be now.

1539
02:28:27.890 --> 02:28:30.869
Christopher J Vidal: as you see it here. But if I went to

1540
02:28:31.300 --> 02:28:38.170
Christopher J Vidal: the other configuration of it, where it's at 39 degrees, then on this side here

1541
02:28:39.390 --> 02:28:40.720
Christopher J Vidal: you're going to come out

1542
02:28:40.820 --> 02:28:42.739
Christopher J Vidal: closer to the edge of the table

1543
02:28:43.120 --> 02:28:53.850
Christopher J Vidal: this side I could cut back, but i'm. I have to be able to support whatever shielding is on it, and again this will be optimized. Right?

1544
02:28:54.250 --> 02:28:56.110
Christopher J Vidal: Thank you.

1545
02:28:56.150 --> 02:29:01.850
SBU CFNS: Oh, what's the height of the

1546
02:29:03.830 --> 02:29:05.160
SBU CFNS: what you made?

1547
02:29:06.540 --> 02:29:09.309
Christopher J Vidal: Yeah, I'm: sorry, Michael. The blue piece.

1548
02:29:09.330 --> 02:29:19.729
SBU CFNS: so you you can always come by as this the slash. Okay, so that's much higher than that. It's still long, maybe problem for paying software

1549
02:29:21.040 --> 02:29:23.390
SBU CFNS: for the

1550
02:29:24.710 --> 02:29:27.269
SBU CFNS: that. That that explains all the way to the back.

1551
02:29:28.490 --> 02:29:34.879
SBU CFNS: It's. It's not all for it to cut off right now, but it will be on the side of the darklight. Set up as well.

1552
02:29:38.410 --> 02:29:45.350
SBU CFNS: The ball piece, which has the blue color in the top. Yeah, yeah, that extends all the way upstream.

1553
02:29:48.150 --> 02:29:49.350
SBU CFNS: Yeah, exactly.

1554
02:29:49.990 --> 02:30:03.099
SBU CFNS: Yes, I assume that, my

1555
02:30:07.380 --> 02:30:08.090
anyway.

1556
02:30:08.470 --> 02:30:09.090
Yeah.

1557
02:30:11.580 --> 02:30:13.910
SBU CFNS: and

1558
02:30:21.670 --> 02:30:22.280
exactly

1559
02:30:24.200 --> 02:30:30.010
Christopher J Vidal: yes. But what I plan on doing, Michael, to be honest with you, like I said, I just got this

1560
02:30:30.410 --> 02:30:35.359
Christopher J Vidal: this morning. But I want to extend this. What you see now. I want to extend it further out.

1561
02:30:35.640 --> 02:30:38.130
Christopher J Vidal: as if it is a an infinite wall.

1562
02:30:38.410 --> 02:30:39.260
Yes.

1563
02:30:40.070 --> 02:30:40.820
Oh.

1564
02:30:41.600 --> 02:30:43.139
Richard G Milner: can I get in

1565
02:30:43.750 --> 02:30:45.590
Richard G Milner: running this thing? But

1566
02:30:47.520 --> 02:30:48.310
Richard G Milner: hello.

1567
02:30:48.510 --> 02:30:52.399
Richard G Milner: I just didn't want to interrupt the discussion.

1568
02:30:52.840 --> 02:31:02.169
Richard G Milner: Yeah. So I have a a comment on a question. So actually, the common is kind of aligned with what we just were. You were just talking about. it seems like when

1569
02:31:02.820 --> 02:31:13.590
Richard G Milner: when there's new ray trace, and the next iteration, and all stuff is in that there should be a pretty good interaction with the laboratory triumph along the lines of what we had at the review.

1570
02:31:13.930 --> 02:31:19.629
Richard G Milner: because you know, there's all these issues alignment and and and

1571
02:31:19.950 --> 02:31:32.710
Richard G Milner: surprises that we had windows, vacuum windows, and what happens if things break. And what was the vacuum? I'm. Not sure. I really understood what the demand on the vacuum is, so I I think it's really important.

1572
02:31:32.790 --> 02:31:37.370
Richard G Milner: Once we kind of converge, and I don't think it has to be, You know, the absolute convergence, but

1573
02:31:37.790 --> 02:31:40.349
Richard G Milner: we should have another

1574
02:31:40.670 --> 02:31:49.919
Richard G Milner: iteration of the type. I think we had at that review, which was really very good, bringing all the people together. But I I really think that rather than us kind of going to

1575
02:31:50.330 --> 02:32:00.440
Richard G Milner: putting it down to the last bold hole or not, or something, you know, at some point we need to check in with them at the laboratory, and just see how they do things so. But this is really good.

1576
02:32:00.790 --> 02:32:05.000
Christopher J Vidal: I have. Richard started to get some really really good

1577
02:32:05.020 --> 02:32:16.149
Christopher J Vidal: assistance from from Kate and from They've been providing me with some good information that I can work with.

1578
02:32:16.270 --> 02:32:24.410
Richard G Milner: I mean, I didn't I didn't play any any criticism of of the lab. I'm just saying it's kind of a natural.

1579
02:32:24.450 --> 02:32:36.890
Christopher J Vidal: I i'm putting it on my own shoulders, because to be honest with you, with the amount of work that I've had to do lately. I'm just starting to get to

1580
02:32:37.240 --> 02:32:54.099
Richard G Milner: is great, and all i'm just saying is, I think I thought that interaction, which was kind of formal and took had to be Scott. Obviously, there are a lot of people from the lab that have to whose time has to be scheduled. So we have a meeting, but maybe a Mini version of that would be good, you know.

1581
02:32:54.700 --> 02:33:11.680
Richard G Milner: So the other one was. That was then a question, and I hope Michael doesn't get offended. But I mean, if I listen to look at it, that the gems dominate everything. They're the biggest thing on this experiment, and of course their their legacy from you know we didn't design the gems for this. So i'm just a little concerned

1582
02:33:11.930 --> 02:33:12.820
Richard G Milner: that

1583
02:33:12.940 --> 02:33:19.639
Richard G Milner: the the size of them, and everything associated with them is kind of driving the design of the experiment at this point, and

1584
02:33:20.230 --> 02:33:36.970
Richard G Milner: I mean somebody. Tell me if i'm wrong. But if I listen to it vacuum chamber. So the question is like, Why do we? If we had to optimally design, or how would it be as big as the things we're looking at here in the in the picture, or am I just

1585
02:33:37.310 --> 02:33:48.060
Christopher J Vidal: off base, or whatever could you just repeat that question, Richard? Right in the middle of it. You kind of clipped out, and I didn't really. Oh, sorry. Well, it's mainly to Michael, I guess. Who's fought?

1586
02:33:48.440 --> 02:33:55.380
Richard G Milner: You know most deeply about these things. The tracking, I mean it. We we, you know. We know why we have these jams, because we

1587
02:33:55.410 --> 02:34:01.939
Richard G Milner: where they were funded and built for another application, and we're using them. But it just seems like.

1588
02:34:02.110 --> 02:34:11.059
Richard G Milner: So why is the active area? Let me put it more more specific. What what active area of those trackers do we actually use in in our measurement.

1589
02:34:11.910 --> 02:34:23.850
SBU CFNS: Richard, that we actually designed for this experiment? And the design was driven by the size of the tracks in the form of plane region. Full trajectories, for example.

1590
02:34:23.950 --> 02:34:30.910
SBU CFNS: But it was a conservative.

1591
02:34:35.310 --> 02:34:45.020
SBU CFNS: but in the we have certainly a little bit more now dissipated. So 5 years ago.

1592
02:34:45.150 --> 02:34:55.720
SBU CFNS: Yeah. So so I mean, if I would be designing, I would make them probably 5 cm longer and maybe I 10 cm.

1593
02:34:58.740 --> 02:34:59.520
SBU CFNS: but

1594
02:35:00.130 --> 02:35:04.960
SBU CFNS: I mean

1595
02:35:10.300 --> 02:35:23.939
Richard G Milner: well, I guess what you're saying is that they're fairly well matched to what we need, so that's good. I I I just want to.

1596
02:35:24.430 --> 02:35:25.280
Richard G Milner: Yeah.

1597
02:35:25.440 --> 02:35:52.940
SBU CFNS: I mean, the question is, do they? They? They have this large footprint around the active area. I guess it's for the electronics or read out, or whatever is that that's seems awfully, very large to me, I mean, I guess i'm used i'm not used to.

1598
02:35:52.960 --> 02:35:57.140
SBU CFNS: If I get some stretched out or within the plane, you know

1599
02:35:57.270 --> 02:36:03.370
SBU CFNS: a template frame and that has to have the

1600
02:36:03.470 --> 02:36:08.770
SBU CFNS: so that that design was was driven by by sorry.

1601
02:36:13.790 --> 02:36:15.710
SBU CFNS: and at that point

1602
02:36:15.920 --> 02:36:24.210
SBU CFNS: we were not too concerned with spatial constraints on the sides, as we used to be. For example, in the

1603
02:36:24.440 --> 02:36:27.610
SBU CFNS: be careful not to reduce too much space on the side.

1604
02:36:27.630 --> 02:36:28.420
Richard G Milner: Yeah.

1605
02:36:28.450 --> 02:36:31.339
SBU CFNS: this is on it did not

1606
02:36:32.160 --> 02:36:33.950
SBU CFNS: what's wrong on springs.

1607
02:36:34.790 --> 02:36:37.390
SBU CFNS: Well, that's how it ended up to look like

1608
02:36:37.700 --> 02:36:47.489
SBU CFNS: and it, you know it's all when we design. This was so back 2,016

1609
02:36:47.820 --> 02:36:57.710
SBU CFNS: and then we have these this multiple rounds of proposals at jail to do a true spectrometer, and

1610
02:36:58.100 --> 02:37:12.589
SBU CFNS: at that point we have to fix the design because of the grant or expired right. We had to go really something and and spend the money and the conservative design that will be flexible enough. Yeah.

1611
02:37:12.860 --> 02:37:22.680
Richard G Milner: no, no, I I I thank you. I mean i'm, i'm not trying to. I mean, I think They're excellent detectors, and we just have to live with them. I mean. I was just

1612
02:37:23.090 --> 02:37:33.530
Richard G Milner: reminding myself, just looking at pictures, and I mean, I guess I'm used to maybe higher energy experiments where typically the focal plane detectors are kind of smaller than the magnets. But here.

1613
02:37:33.540 --> 02:37:51.340
Richard G Milner: the tracker is bigger than you know, kind of as an equivalent footprint of the manga. But that's that's fine. And so we basically. Need all the active areas. What you're saying to to actually measure in the full complaint. I think I think Richard absolutely front to back on them. So in the long access. If the

1614
02:37:51.610 --> 02:37:55.289
Christopher J Vidal: ray traces were visible in there, you would see that the

1615
02:37:55.540 --> 02:37:57.379
Christopher J Vidal: at the angles like that

1616
02:37:57.450 --> 02:38:13.519
Christopher J Vidal: you do kind of use the whole service. It's it's close side to side. I I agree with with Everyone's compliment time of time with them you not using as much. You could probably reduce it if you needed to.

1617
02:38:13.550 --> 02:38:14.199
Yeah.

1618
02:38:14.410 --> 02:38:27.920
SBU CFNS: So

1619
02:38:33.530 --> 02:38:34.230
yeah.

1620
02:38:35.290 --> 02:38:37.850
SBU CFNS: okay, thanks thanks to Michael Yup.

1621
02:38:38.700 --> 02:38:42.080
SBU CFNS: So you got 40 cm into the

1622
02:38:42.390 --> 02:38:48.509
SBU CFNS: but the scintillators. I've got 8 cm times 38 it's only 37.

1623
02:38:49.080 --> 02:38:51.750
SBU CFNS: You need to do it. You need to more

1624
02:38:59.710 --> 02:39:05.879
SBU CFNS: that's maybe a problem with. But we're

1625
02:39:07.820 --> 02:39:09.720
we'll see. Okay.

1626
02:39:09.900 --> 02:39:13.450
SBU CFNS: or I could make it.

1627
02:39:13.540 --> 02:39:22.039
SBU CFNS: But you can also. Yeah, you should someone that I can add, I have a prototype ready now, which is 38

1628
02:39:22.560 --> 02:39:23.930
SBU CFNS: millimeters wide.

1629
02:39:24.350 --> 02:39:26.949
SBU CFNS: This the the current.

1630
02:39:26.990 --> 02:39:29.790
SBU CFNS: So we have to be crazy. I don't know your asymmetric

1631
02:39:29.840 --> 02:39:30.910
SBU CFNS: bye.

1632
02:39:31.060 --> 02:39:36.110
SBU CFNS: which won't be the case of the final. So we haven't started testing it yet, because,

1633
02:39:55.680 --> 02:39:57.870
SBU CFNS: I don't think our

1634
02:39:58.290 --> 02:40:00.530
SBU CFNS: the the 15 cm

1635
02:40:00.880 --> 02:40:04.970
SBU CFNS: like a of each calendar, and then they need to be bored to.

1636
02:40:05.460 --> 02:40:21.199
SBU CFNS: So

1637
02:40:32.240 --> 02:40:38.749
SBU CFNS: it's just the question of the window only we need to butter

1638
02:40:47.590 --> 02:40:55.500
SBU CFNS: it's special, but it doesn't matter if the barrel up to the software.

1639
02:40:56.580 --> 02:41:01.080
SBU CFNS: Yeah.

1640
02:41:03.480 --> 02:41:07.310
SBU CFNS: their

1641
02:41:11.400 --> 02:41:18.710
SBU CFNS: yeah.

1642
02:41:24.570 --> 02:41:29.380
SBU CFNS: So you would prefer to keep a centimeter down.

1643
02:41:29.940 --> 02:41:39.150
SBU CFNS: You should think about like.

1644
02:41:39.320 --> 02:41:40.939
SBU CFNS: So you you sort of have a

1645
02:41:41.210 --> 02:41:44.320
SBU CFNS: resting there. So

1646
02:41:45.050 --> 02:41:55.510
SBU CFNS: okay, yeah.

1647
02:41:56.060 --> 02:41:57.950
SBU CFNS: 2 months. Yeah. So

1648
02:41:57.970 --> 02:41:59.400
SBU CFNS: they really.

1649
02:42:00.530 --> 02:42:02.370
Yes, Yes.

1650
02:42:05.490 --> 02:42:13.249
SBU CFNS: yeah. So when you actually your point is you can't support them on both sides, but the pressure pushed on the middle of that

1651
02:42:13.800 --> 02:42:23.680
SBU CFNS: potentially crack. Yeah, I don't, I but I don't think the pressure is up high and well, we're we're gonna for 8 or 8 simulators in the plane, maybe we can't have

1652
02:42:23.710 --> 02:42:29.210
SBU CFNS: 96 light guards. Yeah, right, that if you are both hands.

1653
02:42:29.670 --> 02:42:30.680
SBU CFNS: And

1654
02:42:31.720 --> 02:42:33.999
SBU CFNS: so if they start to crack.

1655
02:42:41.660 --> 02:42:48.869
SBU CFNS: if you have a what we have, we will do. Support back and simulate it, but we don't.

1656
02:42:49.330 --> 02:42:52.380
SBU CFNS: We. We could add some support

1657
02:42:52.640 --> 02:43:02.090
SBU CFNS: bar across the

1658
02:43:02.110 --> 02:43:05.960
SBU CFNS: We could do that because we're not.

1659
02:43:06.260 --> 02:43:14.409
SBU CFNS: I thought you might actually on a lot of that.

1660
02:43:14.590 --> 02:43:22.349
SBU CFNS: So let's get back to Chris here. Yeah. Anything else from your side, Chris.

1661
02:43:22.620 --> 02:43:24.479
Christopher J Vidal: Oh, I'm: I'm: Good.

1662
02:43:25.080 --> 02:43:30.259
SBU CFNS: Oh, okay.

1663
02:43:31.410 --> 02:43:32.390
SBU CFNS: So

1664
02:43:32.880 --> 02:43:35.850
SBU CFNS: So we'll break for lunch. Now.

1665
02:43:36.120 --> 02:43:42.779
SBU CFNS: Normally, there's lunch until 1 30, 30. This is where we are exactly on the schedule. Let's just do that.

1666
02:43:42.820 --> 02:43:46.670
Christopher J Vidal: Are we saying? Do you guys mind terribly by break for breakfast?

1667
02:43:46.790 --> 02:43:59.689
SBU CFNS: You have to have lunch. Breakfast is not. Can we send an email to people? sorry earlier than 1 30.

1668
02:44:00.470 --> 02:44:05.170
SBU CFNS: It is going to take us an hour and a half to 50 to go to the one for us.

1669
02:44:05.600 --> 02:44:08.179
SBU CFNS: The problem is.

1670
02:44:08.610 --> 02:44:12.990
SBU CFNS: Yeah, I know.

1671
02:44:13.180 --> 02:44:16.149
SBU CFNS: So so i'll stay here.

1672
02:44:16.560 --> 02:44:29.619
SBU CFNS: So I was gonna say we can close this room sample to leave our things here, so you can walk through. Yeah. Anybody in the department or many people in the department know the code to this. But those are your grad students.

1673
02:44:29.740 --> 02:44:46.910
SBU CFNS: and I guess theoretically they might be stealing out. But it's conspicuously gonna the building's locked. So yeah, but we have people in the building, but it's not wandering in there. There's no it's not serious, but it's no. I'm gonna leave my laptop here. I'm happy with the

1674
02:44:49.750 --> 02:44:58.960
Jim Kelsey: Yeah, just leave the the zoom station on.

1675
02:44:58.990 --> 02:45:11.339
SBU CFNS: So just leave the zoom session going, and i'll be working so I can monitor the room.

1676
02:45:11.840 --> 02:45:12.570
Okay.

1677
02:45:31.520 --> 02:45:39.780
SBU CFNS: it's actually, it's. And I actually didn't bring my jacket.

1678
02:45:39.990 --> 02:45:43.570
SBU CFNS: Yeah.

1679
02:45:55.380 --> 02:45:55.940
SBU CFNS: What you?

1680
02:45:57.370 --> 02:46:01.340
SBU CFNS: So

1681
02:46:01.560 --> 02:46:02.830
SBU CFNS: he's

1682
02:46:06.920 --> 02:46:07.490
Okay.

1683
02:46:15.940 --> 02:46:17.440
Yeah. Any.

1684
02:46:17.820 --> 02:46:19.199
see?

1685
02:46:34.070 --> 02:46:34.660
Okay?

1686
02:55:33.500 --> 02:55:35.050
okay.

1687
02:55:40.480 --> 02:55:41.170
okay.

1688
03:12:44.570 --> 03:12:46.070
You're sneaking.

1689
03:12:46.600 --> 03:12:47.699
Christopher J Vidal: I did

1690
03:12:50.860 --> 03:12:54.010
Christopher J Vidal: for now.

1691
03:12:55.250 --> 03:12:56.710
Okay, take it.

1692
03:12:58.420 --> 03:12:59.510
Christopher J Vidal: We're going

1693
03:13:01.020 --> 03:13:03.080
Christopher J Vidal: into the teaching. Oh.

1694
03:14:49.750 --> 03:14:50.350
right?

1695
03:16:18.990 --> 03:16:19.690
Okay.

1696
03:16:53.210 --> 03:16:54.820
Christopher J Vidal: Don't: be like that.

1697
03:18:29.600 --> 03:18:30.410
Oh.

1698
03:18:34.170 --> 03:18:34.720
okay.

1699
03:18:51.150 --> 03:18:51.810
yeah.

1700
03:24:32.520 --> 03:24:33.180
Okay.

1701
03:24:36.140 --> 03:24:36.780
Okay.