JEF meeting, August 11, 2023

Meeting time and location:

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

Agenda

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

    - 70 SICCAS crystals were shipped to us

  • Received 900 short signal cables [1]
  • Procurement parts for the LMS:

    - Waiting for 7,600 ft of optical fibers (August/September)

• 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 [2] - done
  • Prepare to move modules into Hall D [3] [4][5], wrap modules with sort towels.Moved about 800 crystals to the hall [6].
  • Tested, labeled, and bundled all 100 (+ 2 spares) [7] signal cables connected from the flash ADC to the patch panel [8]. Receive cartridges for the printer, will resume labeling and cable bundling today.
  • Cutting optical fibers and gluing plastic caps [9], waiting for 7600 ft of optical fibers
  • Report from students
  • Test fabricated modules using LMS [10], 1242 modules have been tested (need to update the wiki page)
  • Work on refurbishing LG modules (wrapping, PMTs, etc.)
• Testing of PMT dividers -- Sasha / Vlad
  • Received 10 dividers (first article) ! , going to test them during this week (Chris)
• Proceedures
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak / Vlad / Hakob
  • Detector installation [11][12][13]
  • Detector installation page
  • Updates from the meetings with Tim's group [14]
  • Discussion of the FCAL2 installation procedures [15]
  • Final mapping of low-voltage cables
  • Projects for summer students
  • Summer Students (2023)
• Light monitoring system -- Arshak
• Analysis/Simulation
  • Island algorithm update--Simon

Minutes

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

• Still not have received the remaining length of fibers -- expected late August/early September?
• Continue moving crystals to Hall D (now ~1000 on shelves)
• All external (outside of dark room) cables labelled and bundled (+2 spares)
• Checking of modules using dark box and LED continuing
• Electronics for 10 first article PMT dividers arrived -- if okay plan to order full set week of 8/14/23
• Installation of FCAL-2 modules continues -- now up to middle of insert region
  • Some disassembly/reassembly was need to get rid of uneven surfaces
  • Inner support pipe will be reduced in length before installation
    • Rely on air cooling -- expect gradient across insert
• Plan to keep temperature for FCAL-2 blocks near 15 degrees Celsius (can go down to 5 degrees Celsius)
• Arshak continuing to work on fiber ends for integrating sphere
• Discussed possibility to build new fiber profiler to use to measure shower profile
• Simon presented a proof-of-principle that we can use electron tracks in the real data to measure the profile and the S-curve dependence of the position of the showers