JEF meeting, December 18, 2020

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Meeting time and location= 8:30 am EST (JLab time) Bluejeans only

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Attendees: Jane,Zisis,Jared,Liping,Phil,Sasha,Tim B.,Igal,Bill B.

  • Sasha continued the light transmittance measurements: 5 good + 5 discolored
    • Two crystals below spec at 360 nm but okay at higher wavelengths
    • Agree with SICCAS measurements -- no red flags
    • Will try UV curing in January
    • Meet with SICCAS representative in January to provide feedback?
  • Completed construction of 4 crystal modules, one with PMT
    • Rusty-looking module was constructed 6 months ago - should we add a layer of paint?
    • Have enough components for 12 modules
    • Will be getting assistance from Tim W.'s group for mass production
    • Josh working on ESR preshaping -- can do 2 at time in our oven, but Hall C has a larger oven
    • Need to check cookie size (we make them ourselves)
    • Open question is temperature control for brazing and amount of flux
      • Work on procedure in coming weeks
  • 25% tariff for crystals still an issue, could impact order of next batch
    • May need smaller insert size
  • PMT base design converging, tests to measure linearity of amplifier
    • Maybe we don't need the 3x amplifier?
  • Loan agreement with U. Regina is moving forward