Difference between revisions of "JEF meeting, March 10, 2023"

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**: Total 1617
 
**: Total 1617
 
** Wrapped crystals: 32 (Mindy)
 
** Wrapped crystals: 32 (Mindy)
−
*** George (DSG group) finished with disassembling CCAL modules and removing LMS caps
+
*** George (DSG group) finished with disassembling CCAL modules and removing LMS caps. Will work on preshaping ESR reflectors for CRYTUR. The oven will be ready in a week.
−
**: (work on preshaping of ESR reflectors for CRYTUR)
+
*** Mindy (DSG group) solder wires to sockets (while waiting for crystals). More crystals will come from the CCAL after the run in the end of March.
−
*** Mindy (DSG group) solder wires to sockets (while waiting for crystals)
+
*** Parts. 60 remaining PMT housings and cylinders have been ordered by Tim; should be ready for fabrication in about 2 months
−
*** Parts. 60 remaining PMT housings and cylinders have been ordered by Tim (should be ready for fabrication in about 2 months)
+
 
* '''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 1450 </span> (15 modules fabricated since last week)  
+
** Fabricated modules: <span style="color:#FF0000"> Total 1455 </span> (5 modules fabricated since last week)  
−
**: Currently available for fabrication: 32
+
**: Currently available for fabrication: 27
 
<!-- *** [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 -->
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* '''Installation of the FCAL2 detector''' -- Sasha / Arshak
 
* '''Installation of the FCAL2 detector''' -- Sasha / Arshak
 
** [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  
+
** Updates from the meetings with Tim's group [https://halldweb.jlab.org/wiki/index.php/FCAL_2_Installation_Meetings]
 
** 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) ]
−
** Meeting with the detector imaging group
 
 
* '''Light Monitoring System''' -- Arshak
 
* '''Light Monitoring System''' -- Arshak
 +
** [https://userweb.jlab.org/~aasatury/Fcal_LMS/lms_update_march_23.pdf Update on LMS]
 
* '''Simulations/Analysis'''
 
* '''Simulations/Analysis'''
−
** [https://halldweb.jlab.org/wiki/images/2/2e/Glue-jefxd-igal-jaegle-03032023.pdf Updates on eta to ggpi^0] -- ig
 
  
 
=Minutes=
 
=Minutes=
−
Attendees: Sasha,Bill,Igal,Olga,Susan,Liping,Jane,Arshak,Axel,S.T.
+
Attendees: Arshak, Sasha, Phil, Bill, Zisis, Igal, Susan, Jane, Olga, S.T.
−
* Total number of fabricated modules = 1450
+
* Grand total of fabricated modules now 1455
−
** 32 wrapped, ready to be assembled into FCAL-2 modules
+
* Received ESR foil, George from detector support group preshaping for 95 Crytur crystals due in May
−
** After March 20 (end of run) can convert 20 COMCAL modules into FCAL-2 modules
+
* Mindy from detector support group wrapped all available crystals
−
** 95 Crytur crystals expected late April/early May -- plan to get students involved with module fabrication
+
* No news on PMT housing, due within the next 2 months
−
* Detector support group working on shaping ESR in preparation for new Crytur modules
+
* Sasha took data using new PMT dividers in 5x5 CCAL
−
* 60 PMT housings still missing -- these have been reordered
+
* New PCBs with new connector for LV coming soon
−
** 2 month lead time (could be 4 months)
+
* After run ends, need to convert 40 CCAL modules into FCAL-2 modules
−
* New PMT dividers have been installed in 5x5 COMCAL array
+
* ~11 students in the pipeline for summer work (module fabrication/testing, ...)
−
** Installed in hall D -- study rates using beam
+
* Deferred discussion of LMS until next meeting
−
** Plan to use for TAC (flux normalization) run
+
* Discussion of impact of GEMTRD proposal continued
−
** Plan to replace unshielded ribbon cables and connectors for LV distribution with locking connectors and shielded ribbon cables
+
−
* More (first article) dividers have been ordered, due next week
+
−
* First look at response of 5x5 array of FCAL-2 modules  
+
−
** Inner module nearest beam saw 2 MHz rate (not shielded by tungsten absorber, planned for actual insert)
+
−
** Expect ~1 MHz rate in inner modules for FCAL-2 insert
+
−
* Schedule for students during summer coming into focus
+
−
* Sasha discussed with Hovanes regarding controls
+
−
* Arshak to give final report on LMS developments next week
+
−
* Igal presented studies of the impact of including proposed GEMTRD at exit of solenoid on the &eta;&rarr;&pi;0&gamma;&gamma; channel
+
−
** This is in response to a proposed 10-day experiment to study GEMTRD for e/&pi; separation relevant for J/&Psi; studies
+
−
** This prompted a lively discussion about the impact on the JEF program
+
−
** Inclusion of additional material likely to cause signal loss and increased background
+
−
** Would prefer to not have this 10-day proposal run concurrently with JEF/GlueX
+
−
* Igal also showed distributions of separations between clusters for &eta;&rarr;3&pi;0
+
−
** Most clusters are separated by distances far above where merging becomes an issue, but the BR is so much larger than the rare decay that cluster merging still needs attention
+

Latest revision as of 09:17, 17 March 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) available on March 20
      (some CCAL crystals from the inner part will not be used for the FCAL2)
      95 expect to receive from CRYTUR in May [1]
      Total 1617
    • Wrapped crystals: 32 (Mindy)
      • George (DSG group) finished with disassembling CCAL modules and removing LMS caps. Will work on preshaping ESR reflectors for CRYTUR. The oven will be ready in a week.
      • Mindy (DSG group) solder wires to sockets (while waiting for crystals). More crystals will come from the CCAL after the run in the end of March.
      • Parts. 60 remaining PMT housings and cylinders have been ordered by Tim; should be ready for fabrication in about 2 months
  • Module fabrication -- Sasha
    • Fabricated modules: Total 1455 (5 modules fabricated since last week)
      Currently available for fabrication: 27
  • Testing of PMT dividers -- Sasha / Arshak
    • FCAL2 modules with dividers installed on the CCAL [2]
  • Installation of the FCAL2 detector -- Sasha / Arshak
  • Light Monitoring System -- Arshak
  • Simulations/Analysis

Minutes

Attendees: Arshak, Sasha, Phil, Bill, Zisis, Igal, Susan, Jane, Olga, S.T.

  • Grand total of fabricated modules now 1455
  • Received ESR foil, George from detector support group preshaping for 95 Crytur crystals due in May
  • Mindy from detector support group wrapped all available crystals
  • No news on PMT housing, due within the next 2 months
  • Sasha took data using new PMT dividers in 5x5 CCAL
  • New PCBs with new connector for LV coming soon
  • After run ends, need to convert 40 CCAL modules into FCAL-2 modules
  • ~11 students in the pipeline for summer work (module fabrication/testing, ...)
  • Deferred discussion of LMS until next meeting
  • Discussion of impact of GEMTRD proposal continued
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