Technical discussion for CERN/MIT pixel R&D

Thursday 3 Apr 2025, 11:00 → 12:30 America/New_York

Gian Michele Innocenti (Massachusetts Institute of Technology), Ivan Amos Calì (staff@mit.edu), James Kelsey (staff@mit.edu), Jelena Lalic (Massachusetts Institute of Technology), Patricia Smith (MIT Bates Lab for Nuclear Science)

Technical discussions for the ITS3/SVT detector R&D.

ZOOM link

Dropbox paper for round-table discussion

11:00 → 11:15 News

Speaker: Gian Michele Innocenti (Massachusetts Institute of Technology)

11:15 → 11:35 Report on mechanics

Speakers: Holger Witte (staff@mit.edu), Patricia Smith (MIT Bates Lab for Nuclear Science)

11:35 → 11:55 Report on readout and testing

Speakers: Ivan Amos Calì (staff@mit.edu), Leyre Flores (Massachusetts Institute of Technology)

11:55 → 12:10 Update on sensor design

Speaker: Jelena Lalic (Massachusetts Institute of Technology)

• https://gitlab.cern.ch/mosaix/mosaix_rtl/-/merge_requests/1409 (merged), final sdc review

• https://gitlab.cern.ch/mosaix/mosaix_rtl/-/merge_requests/1870 (changed primary delay corner for cts, merged) 
   

• https://gitlab.cern.ch/mosaix/mosaix_rtl/-/merge_requests/1908#note_9332962 - worked on this with Mateo, assertions in the serializer were not evaluated by uvm, fixed now (merged)
   

• Open  issue: Started in parallel a congestion analysis (mainly to understand better limits of shrinkage, high congestion reported with 90um shirnked periphery) https://gitlab.cern.ch/mosaix/mosaix_rtl/-/issues/2047

  

 

 https://gitlab.cern.ch/mosaix/mosaix_rtl/-/merge_requests/1921 - shielding of sbb clk was removed during cts, changed shield nets to cover to avoid this  - merged

https://gitlab.cern.ch/mosaix/mosaix_rtl/-/merge_requests/1701 - model regeneration for sbb_lec and sbb_buf, and added modelling of EN bits for the same blocks (adapted the directed tests), - merged

      Milestone 5: have 3 issues still open, the rest I closed last week and focused on the above as it was a higher priority. 

In general, the implementation is very stable, timing clean. No any issues with these aspects. The only issue I spotted while going through the detailed reports last week are some max transition violations, some of these are ok and can be waived, but some not. Started work on this here https://gitlab.cern.ch/mosaix/mosaix_rtl/-/issues/2049 and will resume this week.

Next: Milestone 5 closure, and adding power pins to sbb models for power aware simulations https://gitlab.cern.ch/mosaix/mosaix_rtl/-/issues/2140

12:10 → 12:30 Report on CMOS AI framework

Speakers: Abraham Holtermann (Massachusetts Institute of Technology), Gian Michele Innocenti (Massachusetts Institute of Technology), Jelena Lalic (Massachusetts Institute of Technology)