JEF meeting, February 26, 2021
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Meeting time and location= 8:30 am EST (JLab time) Bluejeans only
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Agenda
- SICCAS crystals
- COMCAL tests, TAC running, etc.
- SiPM discussion
- Data analysis
- Simulations
Minutes
Attendees: Igal,Zisis,Phil,Susan,Jared,Sasha,Jon,Azizah,Tim B.,Liping,Arshak
- PMT dividers ready to be shipped to Zisis
- Chris S. fixed some issues with the boards
- SICCAS finally responded to our requests for updates
- Expect to ship another batch of crystals (~200?) after return from Chinese holiday
- Need to spend money soon -- some indication from Sasha that we can use OPS money?
- Need to order more PMTs this fiscal year (long lead time: 4-5 months for delivery)
- Work continues on refurbishing Light Monitoring System for COMCAL
- Using wider diameter fibers, getting much larger light output
- Using alpha source for LED stability measurements
- Work continues for improving active base design
- Want to get Fernando B. more involved
- Want to decouple power for amp from other part of base
- Maybe not need amplifier for COMCAL, allow for optional small (~3x) amplification?
- Some discussion regarding use of SiPMs instead of PMTS
- Not feasible for insert (already have ~600 PMTs) but EIC folks are thinking of using SiPMs: maybe we can contribute to effort in some way?
- Would probably have to use an array for typical crystal dimensions
- Radiation hardness? (need to worry about neutrons...)
- Igal has been looking at 3γ and 4γ final states in data and bggen background simulations
- Rough agreement between MC and data for 3γ case, but more features seen in real data
- Looking for evidence of direct B production in π0γ