Difference between revisions of "JEF meeting, January 13, 2022"
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**[https://userweb.jlab.org/~aasatury/Fcal_LMS/beam_test2/ Beam test] | **[https://userweb.jlab.org/~aasatury/Fcal_LMS/beam_test2/ Beam test] | ||
* '''Simulations/Analysis''' | * '''Simulations/Analysis''' | ||
| + | |||
| + | =Minutes= | ||
| + | Attendees: Bill, Arshak, Sasha, Igal, Zisis, Liping, Jane, Olga, Jon, Eugene, Malte, Axel, S.T. | ||
| + | * We have received all 835 Crytur crystals we expected to receive last year | ||
| + | ** All wrapped | ||
| + | ** 95 more expected in May | ||
| + | * Grand total number of fabricated modules = 1408 (only 3 more crystals available for fabrication in lab) | ||
| + | * COMCAL removed from hall | ||
| + | ** Modules need to be at least partially disassembled | ||
| + | *** Replace 25 micron brass straps with 50 micron brass straps? re-wrap? | ||
| + | *** Some tedlar had grease contamination due use of grease for optical coupling | ||
| + | *** PMT shielding: replace FR4 with soft iron | ||
| + | *** Need to remove plastic cap holding optical fiber | ||
| + | * Plan to install 5x5 prototype using COMCAL crystals in hall | ||
| + | ** Instrument with new electronics to test hight rate response | ||
| + | ** Check 3x amplifier in new PMT base design | ||
| + | *** Have 25 bases in house | ||
| + | *** Test noise level | ||
| + | * Plans for module installation coming together: student help, procedures, shims and alignment tools, ... | ||
| + | ** Expect some help from imaging group | ||
| + | * Arshak continuing to work on LMS beam test using 3x3 matrix | ||
| + | ** Plexiglas plate in front with similar design to actual plate but smaller size | ||
| + | ** Middle fully instrumented with FCAL-2 module, sides blanks with varying light access in the front (close/open faces) | ||
| + | ** Measured cross talk using PS setup selecting particular PS tiles | ||
| + | ** Cross talk level <~0.5% integrating over all amplitude, but most of the amplitude is near pedestal | ||
| + | *** Suggest look at amplitude dependence | ||
| + | *** MC simulation of effect? | ||
| + | * Also discussed using individual fibers for LMS | ||
| + | ** Not enough light from 250 micron fibers? Thicker diameter fibers more difficult to bend | ||
| + | ** Light uniformity? | ||
Latest revision as of 09:01, 17 January 2023
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
- Received all 150 CRYTUR crystals from physics division (22-C0275) [1]
- Expect to receive 95 more CRYTUR crystals in May (835 + 95 = 930 in total)
- Wrapped CRYTUR crystals: 835 (ALL available CRYTUR)
- 10 crystals wrapped since last meeting
- Available for wrapping: 10 CRYTUR crystals, 140 SICCAS crystals from CCAL
- Mindy (DSG group) continues wrapping crystals and soldering wires to sockets
- Disassembling CCAL
- CCAL moved to the ESB
- All modules (with SICCAS crystals) are removed
- List of available parts
- Received all 150 CRYTUR crystals from physics division (22-C0275) [1]
- Module fabrication -- Sasha
- Fabricated modules: Total 1408 (12 modules fabricated since last week)
- Testing of PMT dividers -- Sasha / Arshak
- All parts for dividers have been ordered
- Install 25 modules with new dividers on the CCAL, build prototype of LV patch pannel (check rate and noise)
- Installation of the FCAL2 detector -- Sasha / Arshak
- Detector installation page
- Updates from the meetings with Tim's group [2]
- Manpower and division of tasks
- Projects for summer students
- Meeting with the detector imaging group
- Light Monitoring System -- Arshak
- Simulations/Analysis
Minutes
Attendees: Bill, Arshak, Sasha, Igal, Zisis, Liping, Jane, Olga, Jon, Eugene, Malte, Axel, S.T.
- We have received all 835 Crytur crystals we expected to receive last year
- All wrapped
- 95 more expected in May
- Grand total number of fabricated modules = 1408 (only 3 more crystals available for fabrication in lab)
- COMCAL removed from hall
- Modules need to be at least partially disassembled
- Replace 25 micron brass straps with 50 micron brass straps? re-wrap?
- Some tedlar had grease contamination due use of grease for optical coupling
- PMT shielding: replace FR4 with soft iron
- Need to remove plastic cap holding optical fiber
- Modules need to be at least partially disassembled
- Plan to install 5x5 prototype using COMCAL crystals in hall
- Instrument with new electronics to test hight rate response
- Check 3x amplifier in new PMT base design
- Have 25 bases in house
- Test noise level
- Plans for module installation coming together: student help, procedures, shims and alignment tools, ...
- Expect some help from imaging group
- Arshak continuing to work on LMS beam test using 3x3 matrix
- Plexiglas plate in front with similar design to actual plate but smaller size
- Middle fully instrumented with FCAL-2 module, sides blanks with varying light access in the front (close/open faces)
- Measured cross talk using PS setup selecting particular PS tiles
- Cross talk level <~0.5% integrating over all amplitude, but most of the amplitude is near pedestal
- Suggest look at amplitude dependence
- MC simulation of effect?
- Also discussed using individual fibers for LMS
- Not enough light from 250 micron fibers? Thicker diameter fibers more difficult to bend
- Light uniformity?
