Difference between revisions of "JEF meeting, March 31, 2023"
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**: 1450 (modules) | **: 1450 (modules) | ||
**: 32 (ready for fabrication) | **: 32 (ready for fabrication) | ||
− | **: 40 (installed on CCAL) | + | **: 40 (installed on CCAL) |
**: (some CCAL crystals from the inner part will not be used for the FCAL2) | **: (some CCAL crystals from the inner part will not be used for the FCAL2) | ||
**: 95 expect to receive from CRYTUR in May [https://halldweb.jlab.org/wiki/index.php/CRYTUR ] Expect to start shipping crystals in the 2nd week of April. | **: 95 expect to receive from CRYTUR in May [https://halldweb.jlab.org/wiki/index.php/CRYTUR ] Expect to start shipping crystals in the 2nd week of April. | ||
**: Total 1617 | **: Total 1617 | ||
− | ** Disassemble the CCAL prototype | + | ** Disassemble the CCAL prototype |
+ | ::: [https://halldweb.jlab.org/detectors/fcal2/installation/photos/ccal_good.jpg 30 good modules] [https://halldweb.jlab.org/detectors/fcal2/installation/photos/ccal_remove_lms.jpg] | ||
+ | ::: [https://halldweb.jlab.org/detectors/fcal2/installation/photos/ccal_spares.jpg Modules installed in the inner part of the CCAL] | ||
** George (DSG group) is unwrapping CCAL modules and removing LMS caps. He'll also work on preshaping ESR reflectors (100 pcs) for CRYTUR. | ** 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) solder wires to sockets (while waiting for crystals). She will continue with crystal wrapping during next week. | ** Mindy (DSG group) solder wires to sockets (while waiting for crystals). She will continue with crystal wrapping during next week. | ||
* '''Module fabrication''' -- Sasha | * '''Module fabrication''' -- Sasha | ||
<!-- ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf Status of fabrication ] --> | <!-- ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf Status of fabrication ] --> | ||
− | ** Fabricated modules: <span style="color:#FF0000"> Total 1482 </span> | + | ** Fabricated modules: <span style="color:#FF0000"> Total 1482 </span> |
− | **: Currently available for fabrication: 0 | + | **: Currently available for fabrication: 0 (modules will be available during next week) |
<!-- *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 + 3 SICCAS] --> | <!-- *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 + 3 SICCAS] --> | ||
<!-- *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 834 CRYTUR], available: 1 --> | <!-- *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 834 CRYTUR], available: 1 --> | ||
Line 28: | Line 30: | ||
** [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] | ||
+ | ::: - meeting last week (follow up on the cable distribution and design of the LMS) [https://halldweb.jlab.org/wiki/index.php/Distribution_of_signals_and_voltages] | ||
** 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] |
− | + | ||
* '''Light Monitoring System''' -- Arshak | * '''Light Monitoring System''' -- Arshak | ||
** [https://userweb.jlab.org/~aasatury/Fcal_LMS/lms_update_march_23.pdf Update on LMS] | ** [https://userweb.jlab.org/~aasatury/Fcal_LMS/lms_update_march_23.pdf Update on LMS] | ||
* '''Simulations/Analysis''' | * '''Simulations/Analysis''' | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Igor, Sasha, Bill, Arshak, Eugene, Igal, Zisis, Jon, Susan, Olga, Jane, Malte, S.T. | ||
+ | * Crytur crystals expected to start shipping second week of April | ||
+ | ** George from detector support group working on ESR reflectors for this final batch of crystals | ||
+ | * COMCAL has been disassembled, 30 good crystals now in EEL126 to be converted into FCAL2 modules | ||
+ | ** Modules need to be unwrapped and LMS caps removed | ||
+ | ** Not planning to use inner modules of COMCAL due to potential radiation damage, but could be converted to spare modules (10-15) | ||
+ | * Total number of FCAL2 modules remains at 1482 | ||
+ | * Got new PMT divider with new connector, gains to be compared to COMCAL dividers with bypassed amplifier | ||
+ | * All parts available for full set of dividers except for some resistors | ||
+ | * Sasha met with Tim regarding cabling | ||
+ | ** Design makes sure that there is no material in front of chains in FCAL dark room | ||
+ | ** LV/HV bundling/labeling good task for students? | ||
+ | * Decided to go with the individual fiber design for the LMS | ||
+ | ** Some discussion about Arshak's design to punch holes in Rohacel foam (need not be 12 cm thick as in prior design) | ||
+ | ** Some discussion about bundling of fibers and location of integrating sphere (most likely outside dark box) | ||
+ | ** Arshak working on test setups for ~50 fibers at a time: scanner of fiber light output to be installed in ESB? | ||
+ | *** Developing automated procedure to choose good fibers | ||
+ | * Sasha showed that the inner FCAL blocks show obvious radiation damage | ||
+ | ** Also found evidence that some of the LG blocks have cracks. Most of these are in the periphery, maybe by design during the initial construction? | ||
+ | *** Could possibly be checked using small laser | ||
+ | ** FCAL will be surveyed this week -- need to measure stack heights | ||
+ | *** Also need to match bar codes on LG blocks to physical location --> database | ||
+ | * U.Regina group working on machine learning to identify splits from charged particles in FCAL-2 using I.U. approach | ||
+ | ** Trained on omega events, test on eta events? |
Latest revision as of 12:45, 3 April 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
- 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) solder wires to sockets (while waiting for crystals). She will continue with crystal wrapping during next week.
- Module fabrication -- Sasha
- Fabricated modules: Total 1482
- Currently available for fabrication: 0 (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]
- - meeting last week (follow up on the cable distribution and design of the LMS) [5]
- Manpower and division of tasks
- Projects for summer students
- Summer Students (2023)
- Disassembling FCAL
- Light Monitoring System -- Arshak
- Simulations/Analysis
Minutes
Attendees: Igor, Sasha, Bill, Arshak, Eugene, Igal, Zisis, Jon, Susan, Olga, Jane, Malte, S.T.
- Crytur crystals expected to start shipping second week of April
- George from detector support group working on ESR reflectors for this final batch of crystals
- COMCAL has been disassembled, 30 good crystals now in EEL126 to be converted into FCAL2 modules
- Modules need to be unwrapped and LMS caps removed
- Not planning to use inner modules of COMCAL due to potential radiation damage, but could be converted to spare modules (10-15)
- Total number of FCAL2 modules remains at 1482
- Got new PMT divider with new connector, gains to be compared to COMCAL dividers with bypassed amplifier
- All parts available for full set of dividers except for some resistors
- Sasha met with Tim regarding cabling
- Design makes sure that there is no material in front of chains in FCAL dark room
- LV/HV bundling/labeling good task for students?
- Decided to go with the individual fiber design for the LMS
- Some discussion about Arshak's design to punch holes in Rohacel foam (need not be 12 cm thick as in prior design)
- Some discussion about bundling of fibers and location of integrating sphere (most likely outside dark box)
- Arshak working on test setups for ~50 fibers at a time: scanner of fiber light output to be installed in ESB?
- Developing automated procedure to choose good fibers
- Sasha showed that the inner FCAL blocks show obvious radiation damage
- Also found evidence that some of the LG blocks have cracks. Most of these are in the periphery, maybe by design during the initial construction?
- Could possibly be checked using small laser
- FCAL will be surveyed this week -- need to measure stack heights
- Also need to match bar codes on LG blocks to physical location --> database
- Also found evidence that some of the LG blocks have cracks. Most of these are in the periphery, maybe by design during the initial construction?
- U.Regina group working on machine learning to identify splits from charged particles in FCAL-2 using I.U. approach
- Trained on omega events, test on eta events?