JEF meeting, July 21, 2023
From GlueXWiki
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Connection information
Agenda
- Preparation of parts for ECAL modules -- Sasha
- Crystals:
- - Received all crystals from CRYTUR [1].
- - Jane with students performed inspection of 88 crystals, expect to receive 66
- Received all long signal cables from the first order (1200). Received 450 short signal cables [2]
- Procurement parts for the LMS:
- - Waiting for 7,600 ft of optical fibers (August/September)
- Crystals:
- Module fabrication -- Sasha
- All modules have been fabricated, proceed with the final inventorization (about 1610 modules in total)
- Fixing about 20 modules with small imperfections (overlapping Tedla)
- Ongoing projects -- Sasha, all
- Visual inspections of fabricated modules [3] - done
- Prepare to move modules into Hall D [4] [5][6]
- Prepare space for the ECAL in Hall D. Move and install shelves. 70 modules have already been moved into the hall [7].
- Tested, labeled, and bundled (53 bundlesout of 100) [8] of signal cables connected from the flash ADC to the patch panel [9]. Receive cartridges for the printer, will resume labeling and cable bundling today.
- Removing signal cables from the FCAL and rearranging signal cables in the hall [10] Rearranging_FCAL_cables - done
- - 400 signal cables were removed,re-labeled and bundled
- - all cables have been re-arranged, two VXS crates can be removed (will be used by the ECAL)
- - install two flash ADCs
- Cutting optical fibers and gluing plastic caps [11]
- Report from students
- Test fabricated modules using LMS [12] 644 modules have been tested.
- Testing of PMT dividers -- Sasha / Vlad
- All electronics components received, will be shiped to the company to fabricate dividers today (Chris)
- Proceedures
- Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak / Vlad / Hakob
- Started installing detector modules [13][14][15]
- Detector installation page
- Updates from the meetings with Tim's group [16]
- Discussion of the FCAL2 installation procedures [17]
- Final mapping of low-voltage cables
- Projects for summer students
- Summer Students (2023)
- Light monitoring system -- Arshak
- Simulations/Analysis
- File:Island july23.pdf Update on Island algorithm (Simon)
Minutes
Attendees: Bill, Arshak, Igal, Sasha, Liping, Jane, Susan, Olga, Axel, S.T.
- Jane's group inspected 88 SICCAS crystals, of which we will reject 22
- 66 crystals to be sent to JLab, will be inspected on site
- Have 1602 good FCAL-2 modules and ~30? scratched/chipped/poorly wrapped spares in hand
- Checked 644 modules using LED in black box, saw ~25% spread in amplitude
- Wrapping assemblies in plastic in preparation for moving to hall
- Short cables for installation in dark room arriving
- Need to make 47 large cable bundles
- All donuts glued and fibers polished for existing fibers, still waiting for remaining fibers
- Stacking LG in hall continues -- as of meeting, up to layer where lead tungstate crystals would be installed
- Survey and alignment crew checked flatness
- Reference PMTs for LMS will probably need additional magnetic field shielding
- Discussed idea of installing fiber profiler in front of COMCAL to aid in measuring the transverse shower profile
- Simon presented an update on the island algorithm development
- Added S-curve correction to try to remove residual position bias
- Simulation studies indicate small overall position bias, needs to be understood
- Island algorithm works better for insert than for LG region, needs to be understood
- Staggered geometry needs to be added to geometry specification