Difference between revisions of "JEF meeting, March 3, 2023"

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=Agenda=
 
=Agenda=
 
*'''Preparation of parts for FCAL2 modules''' -- Sasha  
 
*'''Preparation of parts for FCAL2 modules''' -- Sasha  
−
** Received all 150 CRYTUR crystals from physics division (22-C0275) [https://halldweb.jlab.org/wiki/index.php/CRYTUR ]
+
** Available crystals:
−
*** Expect to receive 95 more CRYTUR crystals in May (835 + 95 = 930 in total)
+
**: 1450 (modules)  
−
**[https://halldweb.jlab.org/detectors/fcal2/module_fabrication/wrapped/wrapped_crytur.pdf Wrapped CRYTUR crystals: 835 (ALL available CRYTUR) ]
+
**: 32 (ready for fabrication)  
−
*** Available for wrapping: 60 SICCAS crystals from CCAL && prototype [https://halldweb.jlab.org/wiki/index.php/All_modules_(with_SICCAS_crystals)_are_removed] [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/wrapped/ccal_crystals.pdf]
+
**: 40 (installed on CCAL) available on March 20
−
*** George (DSG group) started disassembling CCAL modules and removing LMS caps.
+
**: (some CCAL crystals from the inner part will not be used for the FCAL2)
−
*** Mindy (DSG group) continues wrapping crystals and soldering wires to sockets
+
**: 95 expect to receive from CRYTUR in May [https://halldweb.jlab.org/wiki/index.php/CRYTUR ]
−
**  Disassembling CCAL
+
**: Total 1617
−
*** CCAL moved to the ESB
+
** Wrapped crystals: 32 (Mindy)
−
*** [[All modules (with SICCAS crystals) are removed]]
+
*** George (DSG group) finished with disassembling CCAL modules and removing LMS caps
−
** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/part_preparation.pdf List of available parts]
+
**: (work on preshaping of ESR reflectors for CRYTUR)
−
*** Some PMT housing are missing ( > 60, trying to find with Tim)
+
*** 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)
 
* '''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 1420 </span> (7 modules fabricated since last week)  
+
** Fabricated modules: <span style="color:#FF0000"> Total 1450 </span> (15 modules fabricated since last week)  
−
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 + 3 SICCAS]  
+
**: Currently available for fabrication: 32
−
*** [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.pdf All SICCAS 576 + 3 SICCAS] -->
−
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/11_11_22 Moving modules to the new lab (EEL108)]
+
<!-- *** [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/11_11_22 Moving modules to the new lab (EEL108)] -->
 
* '''[[Testing of PMT dividers]]''' -- Sasha / Arshak
 
* '''[[Testing of PMT dividers]]''' -- Sasha / Arshak
−
** Most parts for dividers have been received
+
** FCAL2 modules with dividers installed on the CCAL [https://logbooks.jlab.org/entry/4140983]
−
** 25 dividers for the prototype are ready (have to be tested), expect to receive the LV patch panel prototype
+
−
during next week. The CCAL prototype should be ready by the end of next week (?)
+
 
* '''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]
Line 31: Line 31:
 
** 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) ]
 
** Meeting with the detector imaging group
 
** Meeting with the detector imaging group
 
* '''Light Monitoring System''' -- Arshak
 
* '''Light Monitoring System''' -- Arshak
−
** [https://userweb.jlab.org/~aasatury/Fcal_LMS/500mkm_fiber/ 500mkm Fiber tests]
 
 
* '''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
 
** [https://halldweb.jlab.org/wiki/images/2/2e/Glue-jefxd-igal-jaegle-03032023.pdf Updates on eta to ggpi^0] -- ig
 +
 +
=Minutes=
 +
Attendees: Sasha,Bill,Igal,Olga,Susan,Liping,Jane,Arshak,Axel,S.T.
 +
* Total number of fabricated modules = 1450
 +
** 32 wrapped, ready to be assembled into FCAL-2 modules
 +
** After March 20 (end of run) can convert 20 COMCAL modules into FCAL-2 modules
 +
** 95 Crytur crystals expected late April/early May -- plan to get students involved with module fabrication
 +
* Detector support group working on shaping ESR in preparation for new Crytur modules
 +
* 60 PMT housings still missing -- these have been reordered
 +
** 2 month lead time (could be 4 months)
 +
* New PMT dividers have been installed in 5x5 COMCAL array
 +
** Installed in hall D -- study rates using beam
 +
** Plan to use for TAC (flux normalization) run
 +
** 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 16:29, 3 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
      (work on preshaping of ESR reflectors for CRYTUR)
      • 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)
  • Module fabrication -- Sasha
    • Fabricated modules: Total 1450 (15 modules fabricated since last week)
      Currently available for fabrication: 32
  • 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: Sasha,Bill,Igal,Olga,Susan,Liping,Jane,Arshak,Axel,S.T.

  • Total number of fabricated modules = 1450
    • 32 wrapped, ready to be assembled into FCAL-2 modules
    • After March 20 (end of run) can convert 20 COMCAL modules into FCAL-2 modules
    • 95 Crytur crystals expected late April/early May -- plan to get students involved with module fabrication
  • Detector support group working on shaping ESR in preparation for new Crytur modules
  • 60 PMT housings still missing -- these have been reordered
    • 2 month lead time (could be 4 months)
  • New PMT dividers have been installed in 5x5 COMCAL array
    • Installed in hall D -- study rates using beam
    • Plan to use for TAC (flux normalization) run
    • 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 η→π0γγ channel
    • This is in response to a proposed 10-day experiment to study GEMTRD for e/π separation relevant for J/Ψ 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 η→3π0
    • 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
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