JEF meeting, July 14, 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 all crystals from CRYTUR [1].

    - Spare crystals

  • Received all long signal cables from the first order (1200). Received 450 short signal cables [2]
  • Procurement parts for the LMS:

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

• Module fabrication -- Sasha
  • All modules have been fabricated, proceed with the final inventorization (about 1610 modules in total)
• Ongoing projects -- Sasha, all
  • Visual inspections of fabricated modules [3] - done
  • Prepare to move modules into Hall D [4] [5][6]
  • Tested, labeled, and bundled (53 bundlesout of 100) [7] of signal cables connected from the flash ADC to the patch panel [8]. Receive printer cartridges, will resume labeling and cable bundling today.
  • Removing signal cables from the FCAL and rearranging signal cables in the hall [9] Rearranging_FCAL_cables - done

    - 400 signal cables were removed,re-labeled and bundled

    - all cables have been re-arranged, two VXS crates can be removed (will be used by the ECAL)

    - install two flash ADCs

  • Cutting optical fibers and gluing plastic caps [10]
  • Report from students
  • Test fabricated modules using LMS [11]
• Testing of PMT dividers -- Sasha / Vlad
  • All electronics components received, will be shiped to the company to fabricate dividers today (Chris)
• Proceedures
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak / Vlad / Hakob
  • Started installing detector modules [12]
  • Detector installation page
  • Updates from the meetings with Tim's group [13]
  • Discussion of the FCAL2 installation procedures [14]
  • Final mapping of low-voltage cables
  • Projects for summer students
  • Summer Students (2023)
• Light monitoring system -- Arshak
• Simulations/Analysis

Minutes

Attendees: Sasha, Igal, Arshak, Zisis, Olga, Liping, Jane, Jon, Susan, S.T.

• Jane's group went to Shanghai and inspected 88 SICCAS crystals
  • Found many poor quality crystals (several discolored, several with chips beyond surface level/chamfers)
  • Will reject 23-25
  • Will use remaining as spares or for other projects (not enough to instrument any more columns in insert)
• Long cables are arriving: have 1200 + 400 from FCAL
  • 53/100 bundles have been prepared
• Remaining fibers for LMS still not expected until August/September
• All modules needed for insert have been fabricated, being prepared to move to hall D
  • Testing each one using dark box (looking at waveforms on oscilloscope)
• Expect first article PMT dividers from outside company soon
• Stacking of lead glass modules in new frame has started, as of meeting 340 in place
  • Up to layer 10, insert starts after layer 19, maybe middle of week of 7/17/23?
  • Survey&alignment to check levelness before we get too far
• Arshak polishing fibers
• Liping visited Modern Physics Institute in China
  • They are working on new accelerator facility to come online in 2025
  • They plan to work on η physics, similar to REDTOP