JEF meeting, August 28, 2020

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Meeting time and location= 9:30 am EST (JLab time) Bluejeans only


Connection instructions

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

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Agenda

  • SICCAS crystals
Test results of PWO crystals (test 3)

Minutes

Attendees: Arshak, Igal, Jane, Zisis, Jon, Susan, Sasha, Liping, Tim B., Josh, Bill B., S.T.

  • Sasha has done measurements on another set of "good" crystals
    • Looked at relative amplitudes (using unchanged crystal in one slot) and resolutions
    • Amplitudes and resolutions roughly agree with other measurements, except for "brown" crystals, with some spread, showing limit of measurement technique
    • Suspicion that beam of leptons in PS arm is not perfectly centered on crystals
    • Consistency of optical coupling? Maybe use air gap instead?
  • Sasha and Vlad went down to the hall to install another set of crystals to study
    • Plan to install Crytur crystal some time in the near future, plan to use these as the reference for SICCAS crystal measurements
  • Chris S. is working constructing 2 new dividers with modified design (new PCB) to increase voltages on first dynode, but try to keep overall spec consistent with Hamamatsu divider spec
    • Plan to install in COMCAL
  • Next few weeks plan is to construct new crystal modules
  • Jared/Igal are working on a signal PDF for dark matter signals, plan to use toy MC to test
  • Sasha will contribute FCAL-2/COMCAL slides, Liping to contribute physics slides for Jeopardy/PAC presentation-- goal: draft for next weeks' meeting.
  • Liping submitted JEF LOI for SnowMass2021
  • Zisis has been working on reorganizing JEF wiki pages and added JEF-related topics to docDB.