JEF meeting, June 24, 2022

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meeting time and location

  • 9:30 am EST (JLab time) remote only
  • Zoom meeting ID: 161 050 9142 Passcode: 004965


    • Students reports
  • Light Monitoring System -- Arshak


Attendees: Bill,Sasha,Igal,Zisis,Arshak,Tegan,Liping,Jane,Jon,Azizah,Olga,Phil,S.T.

  • Igal gave an update on η→π0γγ
    • Currently using default algorithm for analysis while we work on improving the island algorithm
    • Included 2π0 background but most of the background after all cuts are applied is due to η→3π0 and η→2γ
      • Should also include other hadronic backgrounds Sasha included in original simulation for proposal
    • Extracted limit for B→π0γ using FCAL-2
      • Used +/-2.5σ mass window
      • Found worse limit by about an order of magnitude compared to proposal, but should recheck using criteria Liping used
  • For island algorithm would like to compare shower profile for insert to result of snake scan (real data from December 2019)
    • Need to take into account size of beam
  • Module fabrication continues with great assistance from undergraduates
    • Students working wrapping crystals, ESR jigs, etc. -- Brandyn gave a short update on their activities
    • We are still short ~180 crystals
    • Grand total up to 598 fabricated modules, 37 of which are CRYTUR crystals
    • Still have quality control issues with brazing of straps
    • Waiting for mu-metal, but no obvious bottlenecks right now (have enough mu-metal for 1 month of work)
    • Have additional 3D printed jigs for gluing light guides
  • Arshak gave an update on LMS development
    • Integrating sphere has arrived
    • Received 200 feat of fiber
    • To address issue of uniformity of light output over extent of plexiglas, tried reflective paint on edges and coating one side of plexiglas with gortex reflective material on small prototype
      • Looks more uniform but needs to be repeated with full scale prototype