JEF meeting, April 1, 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


  • Preparation for mass production of FCAL2 modules -- Sasha
    • 50 new CRYTUR crystals received
      • Need to perform a quality check
    • DSG group: preshaping (18 foils a day), wrapping (7 crystals a day on average, expect to wrap 10 crystals per day in the future).
    • Contract with the GWU is under preparation (SOW, sole source,...)
    • Chris A. continues to braze strips; discussions regarding brazing quality. Bobby preparing soft Iron housings.
    • Igal continues cutting ESR / Tedlar
  • Module fabrication -- Sasha
  • Light Monitoring System April 1 update -- Arshak
  • COMCAL tests, TAC running, etc. -- Sasha
    • A 3 x 3 calorimeter will be installed on the TAC platform. Will (can) be used as a TAC run during the CPP experiment and other tests in the future.
  • Data analysis
  • Simulations


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

  • Olga has set up the GWU lab for production of silicon cookies
  • Sasha working on contract with GWU
  • NPS running out of space in their lab, will move crystals to our lab; however, we will be moving to a new location some time soon (June?)
  • PMT exchanges continue with NPS
  • Module fabrication continues -- now up to 245
  • Tim W. inspected small FCAL prototype sent to us by Matt
    • Idea is to determine what we need to do to refurbish the lead glass modules in FCAL
  • Absorber in front of beam hole needs to go beyond conceptual stage
  • Sasha presented Arshak's update regarding LMS development
    • Ordered 80x45 cm^2 plexiglas plate with 4x4 cm^2 hole
    • Performed transmission tests on small prototype
      • Roughed surface using sandpaper
      • Glued fibers to face of plexiglas as opposed to drilling holes
    • Looking into using 4" integrating sphere
    • Plan to use 2 fibers per side per crystal row
    • Check stability using alpha source?
  • Had some discussion regarding getting students involved in summer
    • Liping, GWU, Phil all potentially can send students
    • Also master's student from CNU interested in getting involved
    • Sasha to clarify permission for students to come to lab with management
  • Need to update sensitivity plots for 40x40 insert