JEF meeting, January 28, 2022

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Meeting time and location

  • 9:30 am EST (JLab time) remote only
  • Zoom meeting ID: 161 050 9142 Passcode: 004965


  • Module fabrication
  • Light Monitoring System
  • COMCAL tests, TAC running, etc.
  • Data analysis
  • Simulations
    • Checking the 5 degree inefficiency for phi-related problems: [1]


Attendees: Igal,Bill,Tegan,Arshak,Jon,Liping,Jane,Olga,Tim B.,Sasha,S.T.

  • Arshak
- has finished cleaning up the clean room in preparation for module construction
- Arshak and Sasha are making silicon cookies now. 36 cookies are ready, we have just started working on the production of another set.
- started working on the LMS (tools ready to go)
  • Sasha
-had a meeting with the detector support group (DSG) and discussed pre-shaping. They may start working on this during next week (TDB).
Another project for the DSG is wrapping crystals. Hopefully 2 people will be involved soon.
- coordinated with Tim purchasing some equipment (vacuum chamber and pump, air flow box) to set up production of Silicon cookies at GWU.
- loan agreement with GWU is ready. He will send it out for signatures when ordered equipment arrives to the lab
- Eugen got permission for Olga to come to the lab. We have started discussing her visit.
- Sasha and Arshak will resume fabrication of modules during next week.
  • Chris S. has all parts for construction of new PMT dividers using Fernando's design
    • To build a few for bench testing starting maybe next week
  • Tegan presented some photon gun studies focusing on the dip in efficiency at 5 degrees for FCAL2
    • Still not clear what is causing the dip
  • Jon reported for Azizah that there appears to be an issue (lower efficiency compared to studies by other people)with her samples of events at fixed φ=0 degrees