JEF meeting, April 29, 2022

meeting time and location

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

Agenda

• Preparation for mass production of FCAL2 modules -- Sasha
  • Summer Students (2022)
  • DSG:
    • 860 SICCAS foils preshaped. Need to preshape about 40 more, will switch to CRYTUR foils then
    • Wrapping rate: about 20 crystals per week
  • Chris A continues to braze starps (have right now about 40 assemblies)
  • Igal continues cutting ESR, Tedlar, and Kapton foils
  • Silicon cookies (GWU)
    • Olga is planning to come in the beginning of next week and bring some cookies (about 400), see her report
• Module fabrication -- Sasha
  • Modules fabricated by Arshak and Sasha (list on Google Drive) Grand total 345
  • Fabricated modules in TEDF
  • Status of fabrication
• Cabling of the FCAL insert -- Sasha
  • Meeting with Fernando, Tim, and Chris S. regarding LV cable distribution [1]
• Light Monitoring System -- Arshak
• COMCAL tests, TAC running, etc. -- Sasha
  • Design of the 3x3 calorimeter prototype (by Bobby B.). It will be installed on the TAC platform during the CPP run and used for other tests later.
• Data analysis
• Simulations
• Workshops/external meetings
  • DNP 2022 fall meeting: DNP 2022 web site
  • Proposed ECT* (https://www.ectstar.eu/) workshop

Minutes

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

• Sasha presented a list of summer students and a potential schedule for their stays
  • Students need to register with Jlab system in advance
  • Lodging is available in the ResFac except for few weeks in June; students will be relocated to local extended-stay places/apartments/hotels for this gap period
  • In 2023 we expect to take apart and reassemble the FCAL to create FCAL2: student help during this time would be good as well
• Total number of fabricated modules now up to 345
• Lab will be relocated from TEDF to EEL soon, need to update safety documentation
• A plan for strain relief of cables inside the FCAL dark room is in the works
• Discussion of refurbishment of existing FCAL LG blocks if necessary is continuing
• Arshak received the new plastic plate -- light transmission looks much better! Still need machine shop to cut a hole in the center
  • Fiber connectors were 3D-printed
• Design for 3x3 crystal prototype (to be placed on TAC platform in Hall D) ready to go
• Fernando is ordering components and lemo connectors for PMT dividers
• Tegan has been studying performance of Island algorithm for 2-cluster separation in CCAL using simulated particle gun events
  • Reconstruction efficiency appears to be low
  • log-weighting appears to be worse than default energy weighting for cluster position
  • Instead of throwing from the nominal target, throw downstream of FCAL?
• Igal continues to work on η→π0γγ events in MC and data
  • Less background in real data? (not expected..)
  • Discussed handling bad blocks in fiducial region
• Bastian Kubis will co-organize ECT* conference proposal with Susan
  • Will add Daniel Lersch and Igal as "young scientist" co-organizers