General EEEMCal Meeting Summary 8/9/21

PARTICIPANTS: Carlos, Hamlet, Hrachya, JNS, Miroslav, Petr, Renee, Vardan, Vladimir, Tanja, Rosi, Nathaly, Lei, Crytur-USA, Pete

EEEMCAL IN PROPOSALS

• See presentations from EICUGM2021

SIMULATION STUDIES

• Using data from ECCE June 2021 simulation campaign - see page 8-14 in presentation for updates from last time

• single particle electron - one event, sum all towers: 2.8%/sqrtE + 0.5%

• cluster analysis with min deltaR: 2.4%/sqrtE + 2.5% - but not clear why the constant term increases from 0.5% to 2.5% as clustering is used

• These are in general consistent with Pu-Kai's earlier results (https://indico.bnl.gov/event/11919/contributions/50910/attachments/35252/57365/EEMC_status_report.pdf) where standard clustering was used

• for barrel see too many events 636 as compared to 1.2 for the endcap - matching in the CEMC seems to not work correctly

• additional information on ECCE barrel EMCAL:

• ECCE Detector
• ECCE Calorimeter concept

• In the analysis:

• did a standard conversion, no detailed calibration constants
• did not yet take into account optics (except maybe for barrel depending on implementation)

• Action Items

• further investigate clustering in ECCE
• further investigate barrel EMCal in ECCE
• new data: ECCE July 2021 simulations data should be ready later this week
• new data: ATHENA simulation campaign also expected to be ready later this week

PREDESIGN (Carlos and IJCLab-Orsay Team)

• Baseline: Athena (biggest calorimeter)

• Exploring where one could put PCB electronics and where to put cooling (fans, etc.) - circular design from back, water cooling in internal ring (small surface area)

• Cooling is a combination of cooling from inside and back

• Assembly

• 2-3cm frame needed for support
• longitudinally assume space available up to end of DIRC frame (end of prism)
• attached to "DIRC" frame - allows sliding in and out and mounted at predefined mounting points for accuracy
• inner circle respects beamline - clearance ~1cm
• space behind crystals/glass for SiPM/electronics boards --> on order of 20-30cm, more for crystals as these are shorter

• For further design would need more information on electronics/cabling etc.

• Action Item:

• Meet with project in last week of August or first week of September

PROTOTYPE TESTS

• Preparations for beam tests at JLab and DESY ongoing

• For JLab beam tests expect energies: average ~4.5 GeV; full range 2-6 GeV

• Crytur prototype detector

• construction ongoing - ESR reflector preshape sent
• readout electronics ongoing

NEXT MEETING: MONDAY 23 AUGUST AT 8:30AM ET