JEF meeting, August 18, 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. 66 have been pre-selected by Jane's group

    - sent additional 4 (supposed to be from the previous batch). Quality of those crystals is very poor [1][2]

  • Received 960 short signal cables [3]
  • 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 [4] - done
  • Prepare to move modules into Hall D [5] [6][7], wrap modules with sort towels. Need to move about 100 modules to the Hall.
  • 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 960 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. About 60 modules have to be checked / fixed (rejected during installation)
  • Report from students
• 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 [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

• Writeup on FCAL-2 for JLab newsletter

Minutes

Attendees: Sasha, Bill, Axel, Jon, Zisis, Olga, Phil, Liping, S.T.

• Received 70 SICCAS crystals
  • 66 pre-selected by Jane's group + 4 from previous batch (these look terrible!)
• 960 short signal cables labelled and tested -- 1 found to be bad
• No update on arrival of remaining LMS fibers
• Visual inspection of fabricated modules done, in process of moving modules to Hall D
• All modules tested using LMS and dark box, found 2 bad PMTs (have been replaced)
• Stacking continues in hall: now 1286 lead glass + 996 lead tungstate modules have been installed
  • Had to replace some modules due to surface imperfections
  • Survey group checked flatness/slope at current stage of construction, no major issues observed
• Sasha communicated with detector support group to provide further support when Arshak leaves
• Mindy from detector support group continues wrapping modules
• Plan to arrange with JLab communications office to highlight FCAL-2/JEF
  • Phil also discussed press release from his institution