JEF meeting, September 6, 2024

Meeting time and location:

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

Agenda

Preparation of parts for ECAL -- Sasha

• - HV long cable: Sammy and Mindy are finishing up with assembling cables, 2 cables are left
• - HV distribution boards [1][2]

- 5 (12 x 4) and 5 (6 x 8) boards have been received. Chris checked connections. All remaining PCB boards are expected to be in the lab on Sep 12.

- Chris is finalizing design of the distribution boxes (each box will comprise 9 PCBs). He expects to submit PR during next week.

• - Fix front panel of two LV distribution boards [3]

- new plates for the LV distribution boards should arrive to JLab during next week. Need to re-install 2 distribution boards and connect cables

• - LED: Started testing the prototype of the LMS (need to make the detector room light tight)

Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen

• Installation and testing dividers has been completed [4]

- need to arrange cables on chains

- need to arrange cables on cable trays

• Detector installation page
• Safety briefings

Students -- Sasha

• - Expect one student from Wuhan, waiting for the US visa

ECAL commissioning -- Sasha, All

Beam tests with the PS

• measure shower beam profile and reconstruction in the crystal/LG transition region
• (install prototype with 5x5 PbWO4 modules + ? LG)

Other hardware projects

• prototype of the ECAL veto counter (?)

Analysis/Simulation

• • Update from Laveen

Minutes

Attendees: Sasha, Zisis, Susan, Xiaolin, Igal, Phil, Laveen, Jane, Ilya, Liping, Axel, Bill, Stjepan, Malte, Vlad, S.T.

• Xiaolin gave a short presentation introducing herself and her group to our group
• 2 HV cable assemblies are being completed
• Chris S. received first articles of HV distribution boards, tested okay, green light given to produce the rest
• Final design of HV distribution box delayed
• LV distribution boards needed to be adjusted, waiting for 2 plates
• LMS protytype testing to resume, considering adding LEDs
• Major milestone: all PMT dividers installed!
  • Velcro straps installed between chains
  • Cables still need to be organized more neatly
  • Spare cables added inside dark room
• Sasha started ECAL commissioning wiki page
  • Run plan for detector calibration
    • Use Compton scattering to start, π0 events final calibration
  • Plan for rough gain equalization at ~10% level
• Plan to start work on integrating ECAL into DAQ week of 9/9/24
• Start commissioning lead glass region after collaboration meeting
• Still considering using PS setup in Hall to study shower profile, look at lead glass/pwo transition region?
• Liping brought up feasibility of reinstalling downstream muon detector (could expand JEF physics reach)
• Laveen gave an update on close shower separation studies using HyCAL simulation+code
• Bill reminded us of SULI summer student program