JEF meeting, February 4, 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


List of fabricated modules (list on Google Drive)


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

  • Sasha went over preparations from mass production of FCAL2 modules
    • Inventory of SICCAS crystals that NPS does not plan to use: ~440 "good" crystals
    • Detector support group started working on pre-shaping ESR, also will work on wrapping
    • Equipment for GWU (for production of silicon cookies): airflow box, vacuum chamber, pump
    • Arshak and Sasha started producing cookies and light guides
    • Chris A. working on brazing brass strips (some assemblies too small)
  • Arshak and Sasha constructed 14 new modules
    • Takes about 30-40 minutes per module
    • Can produce ~20/week/person
    • Keeping track of progress on google drive
    • PMT divider work on hold in favor of module production for now
  • Arshak working on light monitoring system
    • Enough parts to construct plexiglas prototype for 5x5 crystal array
  • Loan agreement and contract with GWU in the works
  • Tegan presented an update on photon reconstruction efficiencies using single and double photon gun simulations
    • Island and default algorithms have almost the same efficiency as a function of angle for single photons
    • Efficiency profile tracks with conversions in material upstream of FCAL
    • Comparison of 2-photon separation between two algorithms still needs work