JEF meeting, December 1, 2023

Meeting time and location:

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

Agenda

• Preparation of parts for ECAL -- Sasha
  • - signal cables: Received all needed long cables. Redid and tested 4 bundles. All cables are ready.
  • - signal patch panels are ready [1]
  • - HV cables: have received 330 short cables, have been testes and labeled. 800 cables are ready for installation. Long cables are in production
  • - HV distribution boards: Chris is finalizing design of the distribution board, should order 4 boards soon.
  • - LV cables: ordered, lead time unclear
  • - LV distribution boards. The design of the LV distribution board has been finalized. Boards will be ordered during next week.
  • - Optical fibers: received all
• Ongoing projects -- Sasha, all
  • - Testing and labeling cables (Recently labeled cables in boxes)[2]
  • - Prepare modules for the TAC and prototypes (using crystals with some imperfections) [3]
    • Wrapped crystals - done
    • Parts for TAC[4] - done
    • Modules for prototype (25 are ready) - done
  • - Preparation of the LMS
    • - All fibers have been glued to the mounting plate, which will be attached to the integrating sphere. The plate was machined and polised [5]
    • - Need to install light tight covers on the plastic caps. The fibers will be ready for installation after that.
    • - Radiation tests of the PMT active base [6]
  • - Summer Students (2023)
• Testing of PMT dividers -- Sasha / Vlad / Aoran / Boaxin
  • - Testing procedure [7]
  • - Tested 420 dividers [8] (104 last week)
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob
  • Detector installation [9][10][11]
  • Detector survey
  • Detector installation page
  • Updates from the meetings with Tim's group [12]
  • Meeting with Chris Cuevas regarding installing optical fibers and patch panels
• Analysis/Simulation
  • Added new JEF simulation page to wiki
  • Rate simulation studies

Minutes

Attendees: Bill, Igal, Zisis, Vlad, Olga, Sasha, Jane, Azizah, Stjepan, Liping, S.T.

• 4 signal bundles were redone, all signal cables ready
• Patch panels in place
• Short HV cables arrived
• HV distribution board delayed
• Finalizing design for LV distribution board
• Fiber bundles attached to multi-hole interface to integrating sphere
  • Machined flat with diamond mill and polished
  • Visually verified light transmission through fibers
  • Added light-tightness protection
• Installation of LG plexiglas imminent -- sanding ongoing
• PMT divider tests ongoing (now 420 done)
• Rad-hardness test of dividers ongoing (now up to 42 kRad dose, goal 50 kRad)
• Periphery of LG surveyed, recorded position of shims
• Plan to test trigger/DAQ, optical fiber needed
• Cable installation for insert expected to begin mid January at earliest