General EEEMCal Meeting Summary 9/17/21
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PARTICIPANTS: Carlos, Douglas, Hamlet, Hrachya, Sasha, Irina, Crytur-team, Josh, Julien, Lei, Petr, Vardan, Tanja
EEEMCAL IN DETECTOR PROPOSALS
OVERALL
- Simulation analysis ongoing
- EEEMCal teams working on validation of calorimeter performance - ATHENA: AANL, ECCE: U. Kentucky, IJCLab-Orsay
- Cost estimates for EEEMCal submitted to detector proposals
- assumes in-kind as documented in the EOI
MATERIAL IMPACT STUDY (Sasha)
- Performed study of material impact in front of calorimeter - extension of YR study
- 5 interaction length can impact things considerably - recon cluster associated with track may not be enough as electron radiates --> should reconstruct clusters also associated with radiated photon; calorimeter should measure down to 50 MeV
- 5% of radiation length within 1m then have considerable impact; impact of material within 50cm of calo can tolerate more
- magnetic field dependent - impact more severe for higher field
MECHANICAL DESIGN (Julien, Carlos)
- Presentation and discussion
- estimation of load and resulting deformation and stress on inner ring -- suggests that 5mm is sufficient
- sensor and PCB positioning
- cables/services positioning
- flange location and impact on crystal inner radius - currently at ~-3.5 in eta, may reach smaller eta if flange could be moved (not trivial due to access and servicing)
- Impact of different size glass vs. crystal on load on inner ring
- should not be a problem since also have carbon inner structure - can't move
- Carbon inner structure
- no special structure between crystal and glass
- Action items:
- Temperature impact - different sizes
- check if longer glass, e.g., 50cm instead of 40cm would be a problem for mechanical structure, e.g., inner ring load
- Flange position
BEAM TESTS
DESY
- Preparations ongoing
- shipment expected end of September
- Covid travel
JLAB
- Delays with beam start up in Hall D. Discussion on revised prototype beam test scheduling in next few days
- Expect first phase of calorimeter beam test program in beginning of October
CRYTUR PROTOTYPE
- Prototype has been assembled and tested at Crytur - results look very good
- PWO was cooled to -25degC for signal test
- Power supply is external
- Plan to ship prototype to CUA ~October 10th to arrive around October 18th
- Plan to travel to CUA to assist with the assembly and any initial testing
NEXT MEETING: FRIDAY 8 OCTOBER AT 8:30AM ET