JEF meeting, April 28, 2023
From GlueXWiki
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Zoom meeting ID: 161 050 9142 Passcode: 004965
Agenda
- Preparation of parts for FCAL2 modules -- Sasha
- Crystals:
- 10 CRYTUR crystals (out of 95 [1] ) were sent to us last week
- All crystals from the CCAL prototype were removed
- 26 crystals were wrapped by Mindy
- Number of available crystals: 1487 (modules) + 26 = 1513, expect to receive 95 from CRYTUR: 1513 + 95 = 1608 (12 spares)
- George (DSG group) unwrapped CCAL modules and removed LMS caps. Preshaped 48 ESR reflectors, have to preshape 32 more.
- More than 200 long signal cables received, can start checking, bundling, labeling
- Procurement parts for the LMS
- Ordered 16,000 ft of optical fibers. Expect that they will be delivered in May. Adding additional 8000 ft to the PO
- Ordered 18000 of polycarbonate donats
- Crystals:
- Module fabrication -- Sasha
- Fabricated modules: Total 1487
- Available for fabrication: 26
- Fabricate 36 modules using 'low quality' crystals for stacking mockup and 'crash' tests (train students on them)
- Fabricated modules: Total 1487
- Testing of PMT dividers -- Sasha / Vlad / Arshak
- FCAL2 modules with dividers installed on the CCAL [2]
- Met with Vlad P. on Tuesday. Fine tuned the divider circuit (modified some resistors). Chris S. ordered new parts
- Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak
- Detector installation page
- Updates from the meetings with Tim's group [3]
- Discussion of the FCAL2 installation procedures [4]
- Manpower and division of tasks
- Projects for summer students
- Summer Students (2023)
- Light Monitoring System -- Arshak
- Simulations/Analysis
Minutes
Attendees: Igor, Igal, Bill, Stjepan, Sasha, Olga, Arshak, Liping, Jane, Malte, S.T.
- 10 Crytur crystals were shipped to JLab about a week ago
- CCAL crystals all removed and unwrapped, LMS caps removed
- 26 re-wrapped and ready to be fabricated into FCAL-2 modules
- 1513 good crystals available out of 1608 (12 spares)
- 48 ESR reflectors pre-shaped ready for Crytur crystals
- 1487 fabricated FCAL-2 crystals in total
- Some "low quality" modules (with chips, scratches, discoloration) inherited from NPS will be used to test stacking (+ force analysis?)
- Cables are arriving, 200 signal cables ready for labeling and bundling
- Fibers for LMS on order
- Still considering Rohacell solution for LMS fibers
- PMT divider testing continues
- Beam test with 3x amplifiers: had to lower HV, resolution not as good as COMCAL
- Pulse shape with bypassed amplifier looks good, but deformation of pulse shape seen at high amplitude
- Fine-tuning of resistors in divider chain -> can ramp up HV a little
- Need to send out for fabrication soon
- Students: many tasks identified
- Visual inspection of fabricated modules + testing in black box
- Cabling
- Module fabrication
- Testing dividers
- Procedures being updated by Sasha
- Cutting and gluing fibers for LMS (space needs to be assigned)
- Igal meeting with Malachi (head of Data Science group) to get Daniel Lersch involved with JEF