JEF meeting, May 10, 2024

Meeting time and location:

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

Agenda

• Preparation of parts for ECAL -- Sasha
  • - signal cables and 2 patch panels [1] - done
  • - HV short cables: done
  • - HV long cable, 18 ready (out of 36)
  • - HV distribution boards: not designed
  • - LV cables: missing about 20 cables, waiting for the last delivery batch.
  • - LV distribution boards [2]. One board out of 4 is ready
  • - LED: the prototype of the LED board has been received. Chris will populate it with components
• Ongoing projects
  • - Update from Laveen
  • - Testing, labeling and bundling LV cables
• Testing of PMT dividers -- Sasha / Vlad / George / Mindy
  • - Testing procedure [3]
  • - All dividers have been fabricated and tested by George [4]
    • Continue removing regulators from the PCB (about 70 regulators have been removed, require re-testing dividers)
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen
  • Installation and testing cables and dividers [5] [6]
  • Detector installation page
    • (links from the previous meetings [7][8][9])
• Summer students -- Sasha
  • - 2 students from UNCW (May 15), 1 student from GWU (May 19) All paper work has been completed, they are ready to come.
  • - Projects: document all test results, assist with the cable/divider installation, install signal cables on patch panel, work on the ECAL monitoring plots
• 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 (?)
• FCAL2 poster for open house?
  • JEF/ECAL/FCAL poster (Laveen + students + feedback from all of us)
• Analysis/Simulation

Minutes

Attendees: Bill, Sasha, Laveen, Jane, Zisis, Liping, Vlad, Stjepan, Jon, Olga, S.T.

• Almost all short LV cables in house (missing about 20)
• Progress in construction of LV patch panels
• HV distribution boards not ready yet
• Prototype for LED driver PCB in house, to be glued to integrating sphere
• PMT dividers: all testing completed, except newer ones with regulator removed (need to be retested)
• Laveen tested and labeled 100 LV cables + installed/tested dividers for 1 layer in insert
  • Now have layers -21 to -10 installed
  • Next set of rows will have amplifier
• HV cables to be connected to patch panel outside dark box
• Found one bad HV cable, tripping to ground, removed and replaced
• Also found some broken connectors and jumpers not set correctly
• Dark room will be opened on Tuesday to check chiller
• Three students arriving soon
• Plan to keep one arm in PS setup for our own studies during beam
  • Measure shower profile in lead tungstate and lead glass (5x5 each?)
• Plan to have posters for open house
• Discussed possible veto counter near beam line
  • Make prototype with scintillating tiles + wavelength shifting fibers?
  • Veto for Compton events?