Revision as of 08:46, 1 July 2022

meeting time and location

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

Agenda

• DNP2022 abstract
• Simulations/Analysis
  • Update on eta to ggpi^0 -- ig
• Preparation of parts for FCAL2 modules -- Sasha
  • Preparation of parts[1][2][3]
    • Preshaping ESR foils (with the DSG)
    • Wrapping crystals (with the DSG)
    • Module fabrication
  • Wrapped CRYTUR crystals: 491 (60 + 185 + 166 + 80)
    • Remaining 126, 1.5 weeks of work
  • Students reports
• Module fabrication -- Sasha
  • Status of fabrication
  • Fabricated modules: Total 746
    • All 561 SICCAS
    • 37 CRYTUR, Remaining: 442
  • Clean room EEL126

• • Students reports
• Light Monitoring System -- Arshak

Minutes

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