General EEEMCal Meeting Summary 5/3/21

PARTICIPANTS: Crytur-USA (Irina, Olivier), Hamlet Mkrtchyan, Carlos Munoz-Camacho, Richard Milner, Vardan Tadevosyan, Tanja Horn, Vladimir Berdnikov, Renee Fatemi, Bruno Jorion, Artur Hoghmrtsyan, Aram, Douglas Hasell, Lei Guo, Miroslav Finger, Nathaly Santiesteban, Pete Markowitz, Alexander Bazilevsky, Rosi Reed, Hrachya Marukyan,

MEETINGS RECAP

• ECCE

• getting ready to start studies of detector configurations and physics case studies
• Calorimeter conveners: Friederike Bock (ORNL), Yongsun Kim (Seoong U.)

• EIC@IP6 calorimeter conveners announced

• Vladimir Berdnikov (CUA), Paul Reimer (ANL), Oleg Tsai (UCLA)

SIMULATIONS

• Simulation frameworks Fun4All and Escalate have homogeneous electron-endcap calorimeters and similar clustering and reconstruction

• Presentation by Artur Hoghmrtsyan on standalone simulations to investigate reflector, gaps between crystals, etc.

• Crystal wrapping used in previous experiments and/or beam tests

• NPS: 250um ESR+Tedlar between crystals
• DESY: 1mm, Tyvek

• Discussion about beam test programs

• JLab Hall D to begin end of August 2021

• JLab accelerator schedule
• All JLab Hall D planned prototype tests
• The present order of JLab Hall D prototype beam tests is:

• Period 1 (~8 weeks):

• mRICH + GEMTRD/MPGD
• EEEMCal1 + GEMTRD/MPGD
• OTRFT + GEMTRD/MPGD

• Period 2 (~7.5 weeks):

• OTRFT + GEMTRD/MPGD
• EEEMCal2 (+ GEMTRD/MPGD pending further discussions)
• EEEMCal3/TPEX 5x5

• DESY to begin end of August 2021

• Action items:

• Circulate ESR information
• Investigation of air gap
• Circulate information about beam tests

READOUT (Irina, Olivier, Bruno)

• Presentation by Crytur-USA on Scintillation Detectors

• Discussion

• Dynamic range for experiments

• want to detect from MeV range to GeV range

• Number of pixels and area coverage

• In general need: small pixels and large size SiPM

• can do small pizel (10um), but the devices are then very small

• Array of photodiodes in Geiger mode: saturation, recovery time - requires several thousand of pixels
• Large area SiPM needed: 2cm x 2cm area coverage

• How to deal with noise

• Previously used: Hamamatsu: S13360-6025PE (6075PE)

• Temperature stability

• temperature as low as possible to reduce noise
• can design a compensation scheme to keep temperature stable
• need to identify sources of temperature variation - many compensation options possibly available

• Arrays of SiPMs

• balance important so one does not lose resolution

• Action items:

• circulate list of specifications: neutron specifications, number of pixels, surface size and coverage

NEXT MEETING: MONDAY 17 MAY AT 8:30AM ET