JEF meeting, February 2, 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: 150 cables received
  • - 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, 100 short LV cables tested 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]. 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 [9][10][11]
  • Installation of the LMS
    • 143 fibers installed during this week (some delays with trainings and safety docs) [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 [14]
    • Bundled and installed signal, HV, and LV cables on the first layer [15][16][17]
  • Still no power on the ECAL platform (expect delay with the development of the trigger/DAQ)
  • Detector installation page
• Simulations -- Simon / Stjepan
  • pi0gg channel simulations and analysis done with genEtaRegge and analyzed with FSRoot for the JEF FCAL2 geometry [18]

Minutes

Attendees: Igal, Sasha, Zisis, Jon, Stjepan, Liping, Olga, Phil, Malte, Jane, S.T.

• LV cables are coming in (100 last week)
  • tested and bundled together
• LV distribution boards on hold while Chris S. works on PMT dividers (~100 fabricated last week)
  • Detector support group to take over testing dividers
• Installation of LMS for ECAL continues, now 187 optical fibers glued to ECAL face and bundled into groups of 40 for distribution to integrating sphere
  • Gluing rate ~25/hour
• Added Kapton tape on inner part of lead glass blocks near insert and started to attach dividers to PMTs
• Plan for how to lay cables in cable trays in place
• Igal advertised new ML project for e/pi separation, possible Lamar student?
• Stjepan presented studies of η→π0γγ using evtgen to generate background channels from η itself
  • Also looked at η→π+π-e+e- and η→π+π-π0γ
  • Used reaction filter + FSRoot