General EEEMCal Meeting Summary 1/14/22

PARTICIPANTS: Sasha, Vladimir, Carlos, Douglas, Hamlet, Hrachya, Olivier, Renee, Vardan, Vladimir, Tanja

SCIGLASS VS PBGLASS

• Using PbGl from Phenix - what would happen if use longer modules?

• At best would not make things better

• longer modules, longer interaction length for hadrons - higher prob to interact and to look similar to electron, so no better e/pi

• longer modules better for high energy, but not better for lower energy - lead glass will have light attenuation

• Beam test: lead glass with definite length and found 40cm

• light attentuation also present in SciGlass

• Lead glass only Cherenkov, SciGlass scintillator and has more photons and attenuation not as much of an impact

• Best type of PbGl for EIC - PbGl can handle about 10kRad - TF1 type best to use (those are the ones that are available from JLab with similar dimensions of SciGlass)

• PbGl straightforward to cut

MECHANICAL DESIGN MODEL

• Need definition of geometry

• Try to get to higher eta coverage with insert

• Action: find out about insert in global context

READOUT

• Array of SiPMs - options availabe from vendor and iterate

• Readout array design for collecting light from large surface - how many SiPMs, light guides

• Prototype tests: Crytur-USA, JLAB

• Testbench: linearity, pixel recovery time, jitters, (methods established by GlueX)

• Need to present concrete plans by spring 2023

• How to read out from 4x4cm^2 - tests are needed for that

• Project: find out what Hamamatsu SiPM cost, Hamamatsu can produce 4x4 matrix (Fernando)

• Orsay: possibility for reading SiPM with ASIC (existing)

• What dont't have yet: photon density (photons from crystal per MeV) for SiPM - for this need calibration spectrum for SiPM (two steps: measure crystal with beam, then calibrate - same tower with LED and increase gain etc.)

• alternative: test with scintillator with radioactive source

• Electron side in EIC need to measure to very low energies - need to understand/reduce noise

• Prototype tests could be done at AANL 1-10 MeV - need to schedule several months in advance

SIMULATIONS AND SOFTWARE DEVELOPMENT

• UK planning to develop software

• Need information on software framework

• AI WG - optimization of EEEMCAL with AI assistance

• Clustering and shower profile evaluation - discrimination of single photons and merged pi0 photons up to highest momentum

• merged photons from pi0 decay
• large modules becomes even more important

PROTOTYPES

• SciGlass should be at MIT by end of March for DESY beam tests

• nine would be ideal

• Low energy tests at AANL - need prototype

SUMMARY SLIDES FROM JLAB PROTOTYPE TESTS

• Crystal
• SiPM
• SciGlass

NEXT MEETING: 4 FEBRUARY AT 8AM ET