JEF meeting, August 30, 2019

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Meeting time and location= 1:00 pm EST (JLab time) F228


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Agenda

China trip report (Sasha)

Minutes

Attendees: Sasha, Josh, Liping, Simon

  • Sasha, Liping and Zhenyu (Jane) visited the Shanghai Ceramic Institute
    • Institute looks good visually
    • The institute has 2 rooms for growing crystals
      • Can grow 2 at time, takes about 3 weeks to grow 30 crystals
      • Will operate 4 ovens for our job
      • On schedule to deliver first crystals in November
    • Institute has test facility for light transmission and light yield with radioactive source
      • Will compare our measurement to theirs
    • Plan is for Jane to work on QA (visual inspection,...) with the institute
      • Working on plan with Rolf and Eugene for paying Wuhan -- service contract?
  • Need 2-3 FTEs for assembly,etc. of crystals -- potential for manpower from Yerevan?
  • Frame design for FCAL-II underway, progress on insert in global design, plan to stay with existing FCAL frame
    • Plan to meet with Tim in next 1-2 weeks
  • Small scale prototype for stacking and other tests
    • Josh is working on design for single-crystal assembly that will allow placing a set of 12 in a box for study with beam using the pair spectrometer
    • Some details still need to worked out
      • Brass straps need to be thicker (25 micron -> 50 micron) or maybe make from stainless steel?
      • Stress analysis, tests
      • Light guide dimensions
      • Cookies for crystal-light guide connection -- how much pressure is needed? what material?
      • To glue or not to glue LG to PMT? Probably glue.
    • Need to build more modules, but Josh first wants to bring first module "best guess design" to completion