JEF meeting, January 26, 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 1280 in total
  • - HV distribution boards: in preparation
  • - LV cables: Received 48 cables during this week
  • - 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
  • - Testing and labeling cables [3], 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 [4] and 35 modules [5] for the beam tests are ready
  • - Preparation of the LMS
    • - Need to glue Al flange to the optical fiber
    • - Ready for installation [6]
  • - Radiation tests of the PMT active base [7]
    • 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 [8]
  • - Tested 637 divider (all fabricated dividers) [9]. No dividers produced during this week.
  • - 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 [10][11][12]
  • Installation of the LMS
    • Started yesterday (after long delay) [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: Stjepan, Vlad, Sasha, Liping, Bill, Zisis, Igal, Jon, Malte, Olga, Jane, Phil, S.T.

• Installation of LMS is ongoing
  • Fibers have been routed and secured on integrating sphere side, to be connected soon
  • Checked fiber transmission with blue led light before gluing on detector side
    • Can glue ~10/hour
  • Used electrical tape on flange at detector side for light tightness
  • Using plastic clamps to organize fiber bundles coming off detector side
  • Bottom half fibers routed downward, upper half split left-right
• First batch of short LV cables finally arrived
• LV distribution boards arrived, need to be populated with connectors
• Plan in place for how to attach short cables in bundles of 6 or 7 to chains
• Divider tests stalled due to fabrication bottleneck
  • Once populated detector support group can help
• Stjepan is running simulations of various η decay channels with branching ratios comparable to η→π0γγ