JEF meeting, February 21, 2020

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

Connection instructions

We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 992533564. Click "Expand" for more details.

  • Make sure you have created a BlueJeans account via your JLab CUE account using this link:
  • If connecting via Web Browser: click this link (no passcode is needed):
  • If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
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    • Dial or
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  • Infrastructure update (TEDF, light yield setup, etc.)
  • Status of the crystal production (SICCAS)
  • Preparation for module fabrication
    • Parts/Materials to be supplied by Tim
      • Brass straps (.001" x 0.5" x 3400') - received and in cleanroom
      • G10 PMT holders - qty 1650 - received and in cleanroom
      • Kapton film 25um Qty (300 ft) HN Kapton film x 12" wide - received and in cleanroom
      • Qty (1) roll 1" 25um thick Kapton tape (63um with adhesive) - received and in cleanroom
      • 66813-B-03501 brass upstream plate - 500 on order - remainder will be done by CMU later
      • 66813-B-03503 brass jacking plate - 500 on order - remainer to be made by CMU later
      • 1020 Steel PMT shield/Housing qty 1620 - being fabricated by CMU
      • 350um Mu metal shield qty 1620 - Purchase req submitted, waiting for order to be placed (out for competitive bid)
      • Acrylic light guides - on hold until a decision is made on diameter


Attendees: Josh, Karthik, Zisis, Arshak, Igal, Susan, Jane, Tim B., Tim D., Jon Z., Sasha, S.T.

  • The clean room in the TEDF is ready to go! Safety documentation is in the works.
  • 150 more PMTs arrived -- need dimension checks
  • Shanghai Ceramics has still not shipped the crystals, although it sounds like things are reopening there.
    • We have money for 500 more crystals but it looks like a new contract will be needed
  • Still trying to arrange contract with Wuhan (original was rejected due to appearance of duplication of effort).
  • We finalized the light guide design: will go with 18 mm diameter standard tube size, connect with crystal with cookie for ease of maintenance.
    • Suggestion was made to test 3x3 array with beam
    • Can also use existing setup in PS arm
  • Dividers: Chris S. working on procuring parts and constructing several modified dividers (1-2 week time frame)
    • Instrument part of COMCAL with 3x, 6x amplification modifications, need to measure resolution
  • Gluex/JEF up for jeopardy this PAC -- need to put together an update