JEF meeting, April 26, 2024
From GlueXWiki
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Connection information
- Preparation of parts for ECAL -- Sasha
- - signal cables - done
- - signal patch panel [1] - done
- - HV short cables: received, checked, labeled (last week)
- - HV long cable, 18 ready (out of 36)
- - HV distribution boards: in preparation
- - LV cables: waiting for about 160 cables (will need to test, label, and bundle)
- - LV distribution boards [2]. Have to populate with connectors, and design a box around the PCB
- - Chris S. is working on the prototype of the LED board. Currently 5 blue LEDs, consider to add red LEDs as well
- Ongoing projects
- - Bundling short cables (groups of 7, 7, and 6 cables): signal (done), HV (done), LV (36 layers done, waiting for cables) [3]
- - Update from Laveen
- Testing of PMT dividers -- Sasha / Vlad / George / Mindy
- - Testing procedure [4]
- - Mindy has finished with preparing all sockets (~1650) !
- - All dividers have been fabricated
- - Need to remove power regulators on about 200 dividers
- - George has tested about 1400 dividers [5].
- - Adding ECAL (and updating FCAL) translation table in the TT.DB (needed for EPICS scalers)
- Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen
- Submitted ePAS for testing installed dividers
- Installation of the LMS has been completed [6]
- Cable and divider installation [7]
- Install cable bundles on vertical chains
- Sort out dividers, set up jumpers (amplifier/by-pass) a]nd install them.
- Two optical patch panels for the trigger distribution installed (Armen and Mark) [8] [9]
- Ethernet switch installed [10]
- Connecting crates to the switch
- Preparing for testing installed dividers
- Detector installation page
- Other hardware projects
- --prototype of the ECAL veto counter
- --study shower profile using PS (also transition region between lead tungstate and LG modules (?) )
- FCAL2 poster for open house?
- JEF/ECAL/FCAL poster
- exhibit stand (modules, PMTs, etc.)
- Analysis/Simulation
- Update on pi0gg bggen studies [14] -- Stjepan
Minutes
Attendees: Bill, Laveen, Igal, Vlad, Sasha, Jon, Stjepan, Phil, Liping, Jane, S.T.
- Still waiting for final batch of LV cables
- Chris S. working on LED driver board
- PMT divider testing continues, fewer than 100 need to be tested (due to regulator fix)
- Laveen reported on his cable bundling+labeling and translation table work
- 36 PMT dividers installed, working on making dark room light tight to test in situ
- Optical fiber + ethernet switch installation for trigger electronics continues
- Some discussion regarding physics trigger: will use new VTP boards for ECAL
- ECAL to be treated like other detectors: inclusion in energy sum
- Need to equalize gains using HV, because no individual gains in flashADC input to trigger
- LED using CAEN1495 pulser as separate trigger input on face of trigger supervisor
- ECAL to be treated like other detectors: inclusion in energy sum
- Igal identified sources of 2γ background in η→π0γγ
- Stjepan gave update on bggen background studies for η→π0γγ
- Plan to generate large sample of simulated events on OSG