JEF meeting, November 12, 2021

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Meeting time and location= 9:30 am EST (JLab time) Bluejeans only


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Agenda

  • SICCAS crystals
  • Module fabrication
- New SICCAS crystals --Sasha
- Beam test of fabricated modules
  • COMCAL tests, TAC running, etc.
  • Data analysis
  • Simulations

Minutes

Attendees: Sasha,Olga,Phil,Bill,Zisis,Liping,Arshak,Tim B.,S.T.

  • Management considering backup plan if SICCAS fails to deliver crystals
  • Plan to report to management regarding status; also considering writing a letter
  • Azizah is working on event samples for split-off studies
  • Expect fabrication of modules to resume in December after end of SRC-CT experiment
    • Still need manpower, hope for student manpower in summer of next year
    • PMTs continuing to arrive at lab, need to check diameters
  • Sasha installed 12 modules to check using PS setup in hall
    • Read out with PS trigger, looked at image of each module on the PS
    • Looked at single module resolutions = ~2.5-3% σE/E
  • Sasha also looked at a set of 12 crystals (9 CRYTUR, 3 SICCAS) with optical grease between crystal and PMT
    • Does not see much systematic difference between coupling with optical grease and actual production version using light guide and cookie
    • SICCAS crystals: 1 brown, 1 scratched, 1 "ok": brown crystal showed largest deviation from average energy resolution