JEF meeting, March 1, 2024

Meeting time and location:

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

Agenda

• Preparation of parts for ECAL -- Sasha
  • - signal cables - done
  • - signal patch panel [1] - done
  • - HV cables: received all cables
  • - HV distribution boards: in preparation
  • - LV cables: 100 cables received, 250 cables in total
  • - LV distribution boards. Received 4 boards, performed initial cehck, need to solder connectors [2]
  • - Optical fibers and parts for the trigger/DAQ have been ordered
• Ongoing projects -- Sasha, all
  • - Tested and labeled ~150 LV and ~200 HV cables -- Laveen
    • Cables ready: 6 layers (LV) and 37 layers (HV)
  • - Prepare modules for the TAC and prototypes (using crystals with some imperfections)
    • 26 modules for TAC [3] and 35 modules [4] for the beam tests are ready
  • - Radiation tests of the PMT active base [5]
    • Finished tests, working on the tech note
  • - Inventory database and GUI for installed electronics
  • - Summer Students (2023)
• Testing of PMT dividers -- Sasha / Vlad / George
  • - Testing procedure [6]
  • - About 1100 dividers have been fabricated
  • - Started removing power regulators on the newly fabricated dividers
  • - George has tested 133 + 41 = 174 dividers (811 tested in total) [7].
  • - Spare PMTs, have about 20, likely need more for the future (order 30 more )?
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad
  • Detector installation [8][9][10]
  • Installation of the LMS
    • 312 fibers installed during this week (800 in total) [11]
  • Cable and divider installation [12][13][14]
  • Still no power on the ECAL platform (expect delay with the development of the trigger/DAQ)
  • Detector installation page
• Analysis/Simulation

Minutes

Attendees: Bill, Liping, Igal, Olga, Laveen, Sasha, Stjepan, Axel, Phi, Jane, S.T.

• Laveen will start working on ECAL geometry
  • Use survey data, develop python script to place crystals individually in xml
• Received all HV cables, but LV cables still coming in in batches
• No progress on LV distribution board
• Chris S. working on PMT dividers, George J. from detector support group testing them
  • Remove power regulator due to results of radiation test (MPOD itself is very stable)\
• All PMT sockets expected to be ready by some time in March
• 800 fibers for LMS installed, working on organizing bundles to go under platform, next start working on upper region (fibers directed left and right)