General EEEMCal Meeting Summary 3/22/24

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PARTICIPANTS: Crytur USA, Hrachya Marukyan, Tanja, Carlos, Justin, Renee, Miroslav, Casey, Douglas H.

UPDATE NSF

MECHANICAL DESIGN

• Two crystal layout options

• regular

• rows shifted to minimize empty space
• with the current beam flange this gives 0.15 higher eta (corresponding to ~half a block) on one of the sides; on the other sides there does not seem to be much gain
• no significant extra mechanical material needed

• Discussion about different treatment of these rows of blocks in terms of clustering reconstruction

• more difficult
• balance gain in acceptance with difficulty
• general consensus is that it should be possible to have a clustering reconstruction algorithm that can take care of the irregular shape, but needs to be checked

• Discussion about different size blocks in that region

• instrumenting irregular block sizes with SiPMS+boards would be more challenging
• integrating different block sizes might be challenging

• In general, people are in favor of increasing acceptance, but concerns about clustering with irregular shape - try to study with clustering algorithm

• Renee will talk to Dmitry
• Justin will talk to Sasha

READOUT - SIPM

• SiPMs with 6mm x 6mm were sent to

• Larry got boards made and assembled with SiPMs

• Considering to send some of them to Germany for radiation testing

SLOW CONTROLS

• Items that may need more discussion

• gas system: how to design such a system in a more open geometry compared to NPS
• LED system
• power supplies for 3000 channels

• Comment on interaction between calibration and slow