JEF meeting, September 8, 2023

Meeting time and location:

• 9:30 am EST (JLab time) remote only
• Connection information

Agenda

• Preparation of parts for ECAL modules -- Sasha
  • Crystals:

    - Received 70 crystals from SICCAS. Visual inspection: 4 dim crystals, 8 with many chips (consider to send them back to SICCAS) [1][2]

    - Plan to send back about 10 crystals

  • Received 1100 short signal cables [3]
  • Procurement parts for the LMS:

    - Waiting for 7,600 ft of optical fibers. PR department prepared PO but forgot to send it out

• Module fabrication -- Sasha
  • All modules have been fabricated, checked, and inventorized (about 1610 modules in total)
• Ongoing projects -- Sasha, all
  • Visual inspections of fabricated modules [4] - done
  • All crystals moved to Hall D[5] [6][7] - done
  • Tested, labeled, and bundled all 100 (+ 2 spares) [8] signal cables connected from the flash ADC to the patch panel [9] - done
  • Test and label 1100 short signal cables - ongoing
  • Tested fabricated modules using LMS [10] - done (need to update the wiki page)
  • Cutting optical fibers and gluing plastic caps [11], waiting for 7600 ft of optical fibers
  • Work on refurbishing LG modules rejected during installation

    - Fixed about 120 modules with different small issues: soldering compound bumps on the brass assembly, small bubbles on silicon cookies, small issues with wrapping

    - Mindy is working on re-wrapping of about 30 crystals. She also continues soldering wires to the PMT connectors

  • Report from students
• Testing of PMT dividers -- Sasha / Vlad
  • -Continue with testing dividers, should be done during this/next week
• Proceedures
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak / Vlad / Hakob
  • Detector installation [12][13][14]
  • Detector installation page
  • Updates from the meetings with Tim's group [15]
  • Discussion of the FCAL2 installation procedures [16]
  • Final mapping of low-voltage cables
  • Mindy continues with wrapping crystals and soldering wires to sockets.
  • Projects for summer students
  • Summer Students (2023)
• Light monitoring system -- Arshak
• Discussion of the budget request for 2024 -- Sasha (all)
• Miscellaneous

- Profiler to measure shower shape

- Veto in the insert region

• Simulation/Analysis
  • Pictures of potential PID/Veto upgrade -- Simon

Magenta shows potential "inner TOF" upgrade]] revised TOF for high rate running

Minutes

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

• Refurbishment of some fcal-2 modules taking place in EEL126 due to bumps in brass straps and other issues
  • Need to make surface as flat as reasonable to reduce likelihood of cracking when installed
    • Removed excess with soldering iron, will reinstall
  • Inspected cookies looking for bubbles
  • Put modules with chipped crystals aside
• Now news regarding outstanding set of optical fibers for LMS
• First article PMT dividers under study, everything looks good, green light for full order soon
• Found 0.3 degree tilt of entire FCAL frame, to be adjusted after ECAL installation complete
• ECAL installed up to layer 36
• Platform for crates ready, 4 racks needed
• Simon showed preliminary geant drawings for potential veto/inner TOF for insert region and modification of existing TOF for high rate running
  • Need better time resolution if more than veto counters
  • Granularity and readout to be designed