JEF meeting, November 15, 2019

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Meeting time and location= 10:00 am EST (JLab time) F226

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  • SNOWMASS update
  • CRYTUR crystals
  • SICCAS crystals
  • Preparations for upcoming run



  • Rory Miskimen agreed to be a convener for the "Parity violation and fundamental symmetry tests" for SNOWMASS
    • We still need to identify a theorist for this sub-group.
  • Liping has contacted Susan Shadmand regarding being convener for the "Quark Flavor Physics" subgroup; Sasha and S.T. talked to Stepan Stepanyan as a possible alternate.
  • SICCAS crystals: the company is still on target for late November delivery
    • Rolf is still willing to support buying more crystals up to a total of 1600 (including the 500 already on order).
  • We are still working on the contract between Wuhan and JLab -- Eugene and Rolf are on board, still working through JLab bureaucracy.
  • We received all 64 CRYTUR crystals -- apart for some minor scratches they all look good.
  • We identified space to assemble the modules in the TEDF; this space should be available in December.
  • 500 PMTS are on order
  • Final module design still needs to be set:
    • Working on stress tests for straps.
    • Attachment of light guides to crystals: plan is to use RTV (glues to light guide material but not as well to the crystal?)
      • Will make these "cookies" ourselves with 2-component material
      • Light guide diameter is slightly larger than PMT active diameter (18 mm vs 16.5-17 mm)
    • ESR reflective material is a little thicker (65 microns) than previously available -- probably still ok.
    • Perhaps build 50 modules? Need to think of mechanism for moving modules between various setups (light transmittance measurements are in Carl Zorn's lab)
  • Beam test setup is awaiting platform (components ordered)
    • 12 module assembly awaiting plate
  • V. Popov has provided design for new bases, plan to test using COMCAL
    • Plan to do rate scan, measure anode current with B-field on
    • Plan to use COMCAL as TAC, check linearity, radiation damage?
  • Optimize beam hole (current 2x2)?