JEF meeting, January 19, 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 165 short cables during this week (1280 in total)
  • - HV distribution boards: in preparation
  • - LV cables: received first article of short cables, production started on Dec. 7, have not received yet.
  • - LV distribution boards. Received 4 boards, performed initial cehck, need to solder connectors
  • - Optical fibers and parts for the trigger/DAQ have been ordered
• Ongoing projects -- Sasha, all
  • - Testing and labeling cables [2], 120 short HV cables testes and labeled during this week.
  • - 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
  • - Preparation of the LMS
    • - Need to glue Al flange to the optical fiber
    • - Ready for installation [5]
  • - Radiation tests of the PMT active base [6]
    • Finished tests, working on the tech note
  • - Inventory database and GUI for installed electronics
  • - Summer Students (2023)
• Testing of PMT dividers -- Sasha / Vlad / Aoran
  • - Testing procedure [7]
  • - Tested 637 divider (all fabricated dividers) [8]
  • - Spare PMTs, have about 20, likely need more for the future (order 30 more )?
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob
  • Detector installation [9][10][11]
  • Installation of the LMS
    • Started yesterday (after long delay)[12] [13]
    • Had to obtain trainings for operating scissor lift (operation without training violates safety rules) (revealed some issues with the lift when inspected by Joe Thomas)
  • Cable and divider installation
    • Started yesterday, making a decision how to stretch them [14]
  • Still no power on the ECAL platform (expect delay with the development of the trigger/DAQ)
  • Detector installation page

Minutes

Attendees: Bill, Sasha, Arshak, Liping, Jane, Phil, Vlad, Stjepan, Olga

• Temporary safety documents in new ePas system in place so work on FCAL-2 installation could proceed
• Received one more batch of short HV cables, expect 2 more batches
• LV cables have not been delivered yet (although we received the first articles last year)
• LV distribution boards arrived and checked
• Plexiglas installation for lead glass finished last week, so installation of LMS for insert can start
  • Feed LMS bundles through hole, to interface with integrating sphere to be mounted on optical bench
• 637 PMT dividers tested, waiting for the remaining to be fabricated
• HV cables being routed through chains
• Still no power on ECAL platform
• Short on manpower: detector support group can help with divider testing
• Igal continues to work with Daniel L. on machine learning algorithms to suppress background