12:15:39 Hello.
12:15:43 i.
12:15:46 Our things.
12:16:00 News work fest
12:15:53 is already here.
12:16:10 All right.
12:16:12 Okay, are we all here.
12:16:15 Most of us.
12:16:18 Let's see.
12:16:26 Yeah, I think that's probably most of us at least.
12:16:31 Okay.
12:16:38 So
12:16:38 let me just check one thing well and.
12:16:53 just get it most up to date.
12:17:00 I haven't heard anything about the days it has been from Marcel since I wrote to him requesting two weeks in April, and there is no update on the schedule so I assume they haven't been allocated time for the full run.
12:17:20 Okay, so there is no new information about the test Spain.
12:17:28 And, yeah, I think that's all we can say about that.
12:17:33 I should point out that we've decided to reschedule the, the, the by, it's now bi weekly monte-carlo meetings. The next one will be next Monday.
12:17:48 And,
12:17:52 and then go every two weeks from there. So the next meeting is next Monday at 12 o'clock.
12:17:59 That's the 24th and then after that will be on the seventh of June, and every two weeks following, so they mesh with the current meeting.
12:18:14 That's until you have gotten tells us what the new time slot for for the effects meeting is.
12:18:23 It looks like it's the same.
12:18:29 Let me, let me find it sorry I'm don't remember where it is.
12:18:34 I'm not super surprised.
12:18:39 As a large overlap of people who
12:18:48 are you, but didn't change from 1215 to 12 or anything like that.
12:18:55 It looks like they can sort of need to find that they cannot find it.
12:19:03 Yeah, okay. Found it.
12:19:09 No, I didn't.
12:19:18 I just posted in the chat Yeah. Okay, awesome. Thank you. sorry, I forgot like thousand emails, since then.
12:19:30 Yep. Okay, let me quickly share screen.
12:19:34 Lucas my screen.
12:19:35 Yep.
12:19:37 So 12 participants and I think was the best one is still 1111 participants on certainly from felt from noon to 1pm and overs one the one who cannot participate, others didn't.
12:19:53 sort of, didn't work. For instance, so this one this user most optimal.
12:19:57 Okay, so we'll, we'll change it to 12 them, or people like 1215 so you can add 15 minutes for lunch. Maybe we should do 1145.
12:20:12 Because then over could be there for 15 minutes, I guess, and mighty could be here.
12:20:20 And they started, and the people who can't do 1145 can be here trust.
12:20:25 I can probably do 1155 45. In fact, I might not be able to to 11 but 1145 shippers.
12:20:35 Any other comments, Patrick your questionable for 11.
12:20:44 Right. Why did I say oh right yeah the class 12 software meeting is 11 to 12, which I only intermittent intermittent we go to is I think it's fine doing 1145.
12:20:57 I think it's a good idea.
12:20:59 The important packets got compromised, like it gives the chance to everyone to attend at least a little bit right and
12:21:07 Okay so, on the third of June and 1145.
12:21:16 Sounds good. Okay, I'll, I'll stop sharing that. Yeah.
12:21:36 Okay, I put it into the calendar so we should get notifications automatically etc.
12:21:43 Okay, what else was there, I don't have anything else, personally, for cheap x.
12:21:54 I was going to, I was been modifying the proposal to include the
12:22:03 new physics requests for possible overlap but whatever was 2.5 GV squared.
12:22:12 The Mark Vander Hagen, a suggested.
12:22:20 So I'm adding that to the proposal.
12:22:25 Assuming that at some point will be asked to update that, and some new Monte Carlo studies.
12:22:35 Other than that, there's the paper that I have a pizza, Ethan.
12:22:45 Again Jaan and myself are writing about the test beam, work, and the analysis.
12:22:51 So that's ongoing.
12:22:54 I'm ready to buy pizza. Next week is busy this week but all back on next week to upgrade the figures.
12:23:06 So, other than that, that's progressing at some point we'll send it around to everyone so that everyone can comment on it, make any suggestions, but I think we can get this out and submitted fizzer FC fairly quickly.
12:23:24 Release I hope we can.
12:23:26 Okay.
12:23:30 Any Jaan anything. Just no i think that's that's pretty much it. Okay, Axl anything from you or or Dave, unfortunately had not been able to make any finished product on the radiative generator.
12:23:45 so I don't have anything there to show. I do have one little minor thing with Michaels, help them the data files, he says, I've got another part tonic calculation, a prediction for.
12:23:59 So this is the Nikolai kibble Mark Vander Hakan pq CD calculation from 2010, a quote, and it's much, it's much more reasonable than the alternative one like the opposite one is like a low outlier.
12:24:16 I think I'm going to start transitioning to using this one when I want to say here's a part tonic model, versus here's a hydroponic model.
12:24:24 And I didn't make a plot, but I can at least show. I just love the class captain and made it a hydroponic model.
12:24:36 So, whoops, let's say, let's say we go from point 952 1.05 and Oops, that's off skill.
12:24:47 Let's try 1.1.
12:24:50 So, they, they use two different sets of PQCD parameters to model their distribution aptitudes, and they don't go all the way down and Q squared. So let me so let's.
12:25:02 Here's what we cover for the three Jeff TPX run.
12:25:08 So, obviously these eventually transition down to two one and epsilon one so epsilon is the x axis are to gamma is the y axis, and they don't go down to lo que squared because they're a part tonic model they have trouble there, and they have two sets
12:25:23 PQCD parameters that they use. One is called CEOs and the others BWLBLW or something, and I don't, I don't, I don't understand the PQCD to know which is better but one is aggressive and one is conservative.
12:25:36 So one says we're going to see a 2% effects, pretty much flat and epsilon the other says about a five to 6% effect with a slight slump. And what be managed you is this is for three, three.
12:25:48 Okay, good.
12:25:49 So, the higher ones in better agreement with what Yun predicts yes yes, I agree on the lower one joins up with Blunden better.
12:26:01 Okay. But, you know, I, this is something we can add to the tool, the tool kit.
12:26:07 But this is that like as of yesterday. Yeah. Okay, sounds good.
12:26:13 Okay. Any questions on that or.
12:26:19 No. Okay.
12:26:22 Wolfgang anything.
12:26:25 Nope.
12:26:26 Okay I've done, and I'm just going through the list of people on my screen so I'm was looking and I am working on implementing Gulshan beam in the in austin dillon simulation.
12:26:40 So, we are playing around with proper discussion probably which is.
12:26:46 Wasn't that already in yo yes but we need to. I mean,
12:26:55 should surprise himself.
12:26:57 Okay,
12:27:04 so hang on. Oh yeah, I'm just doing what he said.
12:27:11 So it's, it's the Gaussian distribution and.
12:27:18 So,
12:27:18 um, so we made. So I can pick your share screen and the same. So, what did you have it opens you can if you don't find it.
12:27:27 Yes.
12:27:29 Yeah. So, it's about seeing says it.
12:27:33 So this is right now are standalone simulation.
12:27:37 And if you're looking at this.
12:27:42 So, basically what we have right now is a pencil light beam and just for testing. And let me quickly share screen. There are several things that I wanted to bring up to the main topic simulation.
12:27:57 One of them is the proper volume target volumes that includes the disco cups etc but let me give you a second. Yes, so this is basically all targets target sell.
12:28:07 Yes, short.
12:28:10 So, this is a cell is basically has the proper shape of cigar shape with proper cops at the end of the fight.
12:28:36 Houses houses shape is constructed in the senses that.
12:28:33 Right now we are exporting the solid object, I call it abstract cigar, so that we could actually. So, we basically have to construct this one is for solid cigars that is used to generate the liquid hydrogen volume and said to target Another one is for
12:28:41 basically target cell shape target sell itself, which is basically I'm a formal cigar cigar.
12:28:50 So I think this one. I will take a look at this weekend, next week in photo. So right now, in the main debug simulation what become becomes uploaded volume I have to generate scattered events, which is basically it up with some links and diameter.
12:29:10 So I think we should get actually this cigar object integrated into event the generator, basically, is a seat for scattered events so we could also include scattered offers this cups, which is not there yet, but and basically this is what we have right
12:29:27 now and we have a pencil like being pigeon them coming to the target and scattered offers this is a six movie, electrons. We need the very low energy just because we wanted to see like how together us and most get to one so it's not like to do medium.
12:29:45 But this is what we're at right now so as you can as working on the uptick in that respect to like being busy actual some gosh and shaped distribution.
12:29:56 So generate random, random distribute of particles around some value here.
12:30:02 What we will do next I will update the current multiple tickets Monte Carlo simulation to include the probe to extract the event generated volume of from based on this liquid hydrogen volume and set the target so we will also generate events, out of this
12:30:21 cups and etc.
12:30:22 And the in principle, that's all we have for now.
12:30:27 But all the shapes of properly done and the master image and the older. It's basically like a of your scenario and also another task for Japan which was postponed.
12:30:37 Because we are working on physics implementation right now is to greens a proper target chamber. Gentlemen there but we responded, so we could learn a little bit of physics implementation, any questions you have so far or I can stop sharing it so it's
12:30:58 already a little updates. Yeah.
12:31:00 Oh, that sounds good.
12:31:03 Yes, but this is one of the things that I think, yeah, I will start. So this is right now as a standalone quote which is available on GitHub for everyone.
12:31:13 I think it's public for me to give up on me and as you can see right there but I will, it's a, it's literally like we have created exactly the same structure where we can just gloss and very similar to what the heavens I mean simulation were just literally
12:31:29 copy and paste objects. So we can just copy and paste functions and replace it with the current one, it so it's very primitive. Yeah, I'm doing demand.
12:31:49 So it's a slight slow because it's learning process and we're actually doing everything from scratch, like physics on the least etc. Based on some Jen for examples but I will. Well, second is working on the standalone standalone whatever type of the feedback
12:31:57 simulation of is a proper geometries. Okay.
12:32:01 Sounds good. Any questions.
12:32:05 Okay.
12:32:07 If not, then moving on.
12:32:17 Richard grow up any anything you want to add or No. Okay, Patrick.
12:32:27 No, it's the last week of the semester here at MIT so just been a little busy so yeah nothing this week. Okay. Good
12:32:41 game. Did you want to add anything to what Maxwell already said are not in particular we're basically working on the same project right now. Yeah, Gabe actually has a cool project if you want to say a word or two about it it's unfortunately it's not directly
12:33:06 TPX related but I think it will be really good training for TX.
12:33:01 So right now we're trying to kind of we're having to build a very bare bones j aren't for simulation to kind of work out some logistical problems with a sheet of flame, and our white paper proposal.
12:33:16 We are working with the positron Working Group at j lab, and we submitted a paper for peer review with a vertically polarized target.
12:33:25 And, unbeknownst to us and the referee kindly pointed out that vertically polarized vertical holding fields.
12:33:35 Just spray laterally a whole bunch of charged molars. and it's the nickname is the sheet of flame.
12:33:42 And they said, Unless we address the sheet of flame then papers, is no go. And so, Gabe is reading a little chance with me.
12:33:50 And we're going to see just what angles the sheet of flame goes to. And this is actually great because it's a much more basic chant and then the next one so I hope, hope this is good training and then, in no time game is going to be editing our teeth
12:34:04 X Files like a problem.
12:34:07 Okay. Um.
12:34:12 How strong is the magnetic field, the whole day feel five Tesla total BTL of.
12:34:19 Yeah, 510 millimeters. Okay, that's, that's better.
12:34:25 Say that again, it will do it that will do something. Yeah.
12:34:30 Yeah, I thought, I don't know, a blast. I don't remember what folding field we had but it was nowhere near five tests like.
12:34:39 Yeah, So you you have the Atomic Beam source. Yeah.
12:34:44 And
12:34:47 that would be nice, except that we're at fixed target like we're at, non re circulating luminosity.
12:34:57 You need density, right, the density we don't we can't we can't recirculate. Yeah. Could you do vertically oriented. Not that I'm just curious about the history of this could you do a vertically polarized.
12:35:12 Yeah, we can, we can have the target of any angle, typically we had it, pointing off at either 30 or 45 degrees in the horizontal plane because it match.
12:35:26 So then it's a cue that was perpendicular or parallel to the Q vector. Cool.
12:35:34 But yeah, in principle, we could do everything. So, but then yeah it was a Atomic Beam source we just generated it continuously and it wasn't very high density.
12:35:52 And it was okay with the blast tour i'd like you could get the app, that was one of the initial problems or the blast destroyed D polarize the magnets in the polarize Jonathan being source.
12:36:11 And we didn't realize that we, we spent a year trying to figure out why we weren't getting the polarization during operation. Whereas when we ran it with the mag that off.
12:36:26 It seemed to work, and we put a polar emitter underneath the abs, it seemed to produce good polarization we finally figured out that the shielding that was in place was inadequate.
12:36:39 And so we took it all apart and put much more heavy heavier shielding around it.
12:36:48 Jen, yes, central low which was the one that you know so the problem, show that the shield in was inadequate
12:37:00 really worked at some point because you got a nice paper and Chris Crawford got a thesis. Yeah, and yeah the bed work very well.
12:37:18 Unfortunately, 2005, do we cut us off before we
12:37:15 go any further, but
12:37:20 yeah.
12:37:22 So, this polarize source that you're thinking of for for pot deposit Ron runs.
12:37:32 sorry, polarize target.
12:37:38 You're just doing this as a, as a concept for the. Yes, push, push towards having polarized or sorry, positrons at j lab. Yes, this is a this is a we're dangling This is a possible physics option, something to be gained.
12:38:00 Yeah.
12:38:10 What I think we're learning is that this experiment is super hard, and it's not even like in the top three of the things I want to do with positron Zj lab so, yeah, yeah, go very far with it it's but what's your top three.
12:38:14 Well the class measurement, obviously, right. I think that's the killer. I would love to do it again it's super big bite it back angles that one Ethan's doing.
12:38:22 And then third is probably the one Andrew is working on the polarization transfer.
12:38:30 These are all the same time, sorry. I'll do for the next and exchange. Yes, I mean I'm not, I don't want to do the.
12:38:38 I'm not.
12:38:40 Yeah. Yes, one could get involved in the DCS stuff but I was thinking to foreign exchange specifically. Yeah, I think TV is actually, I mean that's the core of it.
12:39:06 So,
12:39:00 Is there any
12:39:04 sort of timeline for positrons Jayla
12:39:09 nebulously like five years, six years, something like that. If so many they've committed to building so many things. Yeah, I think realistically it's it's at the end of 10 or 12.
12:39:20 Yeah, I've been when, when they start not being able to fill up the year, two times over his experiments.
12:39:29 Before that, I think it's, it's, I don't think also that there's. I mean, they've taken off.
12:39:39 They have taken over a lot of the gic detector development functionality.
12:39:45 So, so the people are busy.
12:39:48 And I don't see any funding for us, until until the money for the IOC is going down
12:39:58 to mention the fact that they're on the hook for solid there on the Dave committed to building the K long beam and hold D Not to mention, like they are.
12:40:06 Yeah, they already have a lot of stuff so short on money.
12:40:11 I mean, it's not sure it's solid actually through now is that actually. Nope, I'm not absolutely sure that solid new column.
12:40:22 Right.
12:40:24 So,
12:40:27 I mean Bella I guess Muqam but, yeah.
12:40:34 Okay, um yeah we're just trying to get this, get this, this speculative experiment, at least mapped out to flame goes and put our names on it and I don't know I must have some kind of lucked out this my reviewers for that, that one because I got zero
12:40:54 comments.
12:40:55 And I mean it's fundamentally the same as Ethan's right and it hasn't heard anything. I have also received no comments. Yeah, yeah. That's what I'm saying.
12:41:12 Right. Oh, thank you. I have you have you got, I mean, is it through No, No.
12:41:12 Okay, you have no comments but he has not heard anything. Yes, yes.
12:41:17 But maybe I think you need to ask them, Hey, what's the status of this. Yeah, I must have gotten answers.
12:41:27 Yeah, I think actually said he was going to email Eric I think all email Eric.
12:41:32 Eric booty i think is the person.
12:41:35 Yeah, maybe it just fell down, maybe they didn't see that's different from the classroom.
12:41:44 Yeah.
12:41:44 Okay, let's get back to cheat backs of pizza anything you wanted to have.
12:41:52 No, thank you.
12:41:55 Okay, I see the gym is on gym you have anything dad
12:42:04 Jim's asleep. Okay. No, I do not.
12:42:09 I'm having lunch. Yeah. Okay, good. We'll see you tomorrow anyway.
12:42:15 Yep, or.
12:42:19 Yeah, Ethan.
12:42:21 What's tomorrow. Well what's tomorrow. Thursday. No that's today that's today at two o'clock. Oh it's today at two o'clock, you're right, right. Good thing you asked Doug wouldn't have seen you,
12:42:36 my calendar whatever reminded me But, yeah, not a blur, you know, we have the national pm tomorrow at three or four.
12:42:49 Where did we say Didn't we say three yeah I think we said three right.
12:42:53 Okay good, because I have something at fun that's perfect. All right, excellent cook to cook.
12:43:00 Okay.
12:43:02 Ethan.