JEF meeting, December 8, 2023

Meeting time and location:

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

Agenda

• Preparation of parts for ECAL -- Sasha
  • - signal cables: Received all needed long cables. Redid and tested 4 bundles. All cables are ready.
  • - signal patch panels are ready [1]
  • - HV cables: 800 cables are ready for installation. Long cables are in production
  • - HV distribution boards: Chris is finalizing design of the distribution board, should order 4 boards soon.
  • - LV cables: ordered, lead time unclear
  • - LV distribution boards. The LV distribution boards have been ordered.
  • - Optical fibers: received all
• Ongoing projects -- Sasha, all
  • - Testing and labeling cables (Recently labeled cables in boxes)[2]
  • - Prepare modules for the TAC and prototypes (using crystals with some imperfections) [3]
    • Wrapped crystals - done
    • Parts for TAC[4] - done
    • Prepared 26 modules for TAC and 35 modules for beam tests - done
  • - Preparation of the LMS
    • - All fibers are ready for the installation. The plate was machined and polised [5]
    • - Installing light tight covers on the plastic caps [6][7][8][9]
    • - Meeting with Fernando and Chris regarding LED drivers
  • - Radiation tests of the PMT active base [10]
  • - Summer Students (2023)
• Testing of PMT dividers -- Sasha / Vlad / Aoran
  • - Testing procedure [11]
  • - Tested 420 dividers [12]
• Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob
  • Detector installation [13][14][15]
  • Detector survey
    • - waiting for survey results
  • Detector installation page
  • Updates from the meetings with Tim's group [16]
  • Meeting with Chris Cuevas regarding installing optical fibers and patch panels
  • Installation of electronics [17]
• Lead Glass Efforts -- Malte / Mark / Kevin / Zisis
• Analysis/Simulation

Minutes

Attendees: Liping, Sasha, Igla, Aoran, Stjepan, Zisis, Olga, Jane, Jon. S. T.

• All signal cables ready, have half of short HV cables, long HV cables in production
• LV distribution board design finalized, boards ordered (2 week lead time + 1 week to populate)
• Waiting for LV cables -- received first article
• LMS fibers glued to moujutinge plate, in process making everything light tight
• Met with Fernando regarding LED pulser
  • Use one port in integrating sphere to inject light
  • Use CAEN1495 module to generate pulse
• PMT divider tests continue
• PMT divider radiation tests completed (total expoasure = 50 kRad)
  • Amplitude degrades with dose
• Made visual inspection of FCAL, taking note of location of shims
  • Also looking for bubbles in cookie interface -- may need retorquing
  • Found one suspicious PMT -- practice removal?
• Requested survey of FCAL-2 perimeter
• No power on FCAL platform yet, expected in January
• Optical fibers for DAQ will be installed in January/February
• Magnetic shielding for reference PMTs for LMS system will be needed
• Installation of plexiglas for lead glass LMS system underway
• Fiber LMS system for insert will be installed in January, then installation of cables, PMT dividers, etc. will take 3-4 months
• Expecting beam profiler from U.Regina in January, to replace existing rad-damaged profiler
  • Maybe could refurbish old profiler to use for shower profile measurements
• Plan to build 5x5 ECAL array with some LG surrounding, measure properties in transition region