Difference between revisions of "JEF meeting, April 7, 2023"
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** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page] | ** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page] | ||
** Updates from the meetings with Tim's group [https://halldweb.jlab.org/wiki/index.php/FCAL_2_Design_Meetings] | ** Updates from the meetings with Tim's group [https://halldweb.jlab.org/wiki/index.php/FCAL_2_Design_Meetings] | ||
− | :: | + | :: Discussion of the FCAL2 installation procedures [https://halldweb.jlab.org/wiki/index.php/March_5,_2023,_FCAL_Insert_Installation_Meeting] [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation] |
** Manpower and division of tasks | ** Manpower and division of tasks | ||
** [https://halldweb.jlab.org/wiki/index.php/List_of_tasks_and_manpower Projects for summer students] | ** [https://halldweb.jlab.org/wiki/index.php/List_of_tasks_and_manpower Projects for summer students] | ||
** [https://halldweb.jlab.org/detectors/fcal2/installation/students_2023/list_of_students_2023.xlsx Summer Students (2023) ] | ** [https://halldweb.jlab.org/detectors/fcal2/installation/students_2023/list_of_students_2023.xlsx Summer Students (2023) ] | ||
− | ** [https://halldweb.jlab.org/detectors/fcal2/installation/photos Disassembling FCAL] | + | <!-- ** [https://halldweb.jlab.org/detectors/fcal2/installation/photos Disassembling FCAL] --> |
* '''Light Monitoring System''' -- Arshak | * '''Light Monitoring System''' -- Arshak | ||
* '''Simulations/Analysis''' | * '''Simulations/Analysis''' | ||
=Minutes= | =Minutes= | ||
+ | Attendees: Bill, Arshak, Igal, Eugene, Sasha, Zisis, Malte, Jane, Jon, Liping, Tim W., S.T. | ||
+ | * Crytur confirmed delivery date for 95 remaining crystals, to be sent second week of April | ||
+ | * 25 COMCAL modules have been unwrapped, caps for LMS removed | ||
+ | ** 5 wrapped, ready for assembly | ||
+ | * George from detector support group preshaping ESR for Crytur crystals | ||
+ | * Length of LV/HV cables has been fixed | ||
+ | * Fibers for LMS to be ordered | ||
+ | * Number of fabricated modules remains at 1482 | ||
+ | * Bench test setup for PMT dividers has been restored | ||
+ | * Reference PMT for LMS system need to be shielded due to fringe field of solenoid | ||
+ | ** Plan to test one new divider to verify gain, then ask for first article of final version | ||
+ | * Concerns brought up at installation meeting | ||
+ | ** Module compression: number of plates in on each side of insert region? | ||
+ | ** Center of gravity of lead glass assembly ~2 cm from downstream end of PWO crystal | ||
+ | ** Tim suggested putting brass straps on top/bottom of crystals | ||
+ | ** Some discussion of having 2 mm thick plate on top between crystals and LG, would like to avoid | ||
+ | ** Shims between PMT housings | ||
+ | ** Need to compensate for width of stainless steel straps used for LG, have spares, could be used for this purpose? | ||
+ | * Students start arriving in May; Jane will send a student | ||
+ | * Igal found ~90% efficiency for CCAL-implementation of island algorithm for 2 photons | ||
+ | ** Merging of soft photons not enabled in default algorithm | ||
+ | * Discussed possible presentation at Hadron conference |
Latest revision as of 08:38, 10 April 2023
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Zoom meeting ID: 161 050 9142 Passcode: 004965
Agenda
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
- Available crystals:
- 1450 (modules)
- 32 (ready for fabrication)
- 40 (installed on CCAL)
- (some CCAL crystals from the inner part will not be used for the FCAL2)
- 95 expect to receive from CRYTUR in May [1] Expect to start shipping crystals in the 2nd week of April.
- Total 1617
- Disassemble the CCAL prototype
- Available crystals:
- George (DSG group) is unwrapping CCAL modules and removing LMS caps. He'll also work on preshaping ESR reflectors (100 pcs) for CRYTUR.
- Mindy (DSG group) 5 modules wrapped. She continues soldering wires to sockets
- Fix length of LV and HV cables inside the dark box. Chris S. will place an order.
- Got quotes for optical fibers for LMS, will order them today.
- Module fabrication -- Sasha
- Fabricated modules: Total 1482
- Currently available for fabrication: 5 (modules will be available during next week)
- Fabricated modules: Total 1482
- Testing of PMT dividers -- Sasha / Arshak
- FCAL2 modules with dividers installed on the CCAL [3]
- Installation of the FCAL2 detector & integration to GlueX -- Sasha / Arshak
- Detector installation page
- Updates from the meetings with Tim's group [4]
- Manpower and division of tasks
- Projects for summer students
- Summer Students (2023)
- Light Monitoring System -- Arshak
- Simulations/Analysis
Minutes
Attendees: Bill, Arshak, Igal, Eugene, Sasha, Zisis, Malte, Jane, Jon, Liping, Tim W., S.T.
- Crytur confirmed delivery date for 95 remaining crystals, to be sent second week of April
- 25 COMCAL modules have been unwrapped, caps for LMS removed
- 5 wrapped, ready for assembly
- George from detector support group preshaping ESR for Crytur crystals
- Length of LV/HV cables has been fixed
- Fibers for LMS to be ordered
- Number of fabricated modules remains at 1482
- Bench test setup for PMT dividers has been restored
- Reference PMT for LMS system need to be shielded due to fringe field of solenoid
- Plan to test one new divider to verify gain, then ask for first article of final version
- Concerns brought up at installation meeting
- Module compression: number of plates in on each side of insert region?
- Center of gravity of lead glass assembly ~2 cm from downstream end of PWO crystal
- Tim suggested putting brass straps on top/bottom of crystals
- Some discussion of having 2 mm thick plate on top between crystals and LG, would like to avoid
- Shims between PMT housings
- Need to compensate for width of stainless steel straps used for LG, have spares, could be used for this purpose?
- Students start arriving in May; Jane will send a student
- Igal found ~90% efficiency for CCAL-implementation of island algorithm for 2 photons
- Merging of soft photons not enabled in default algorithm
- Discussed possible presentation at Hadron conference