Difference between revisions of "JEF meeting, August 5, 2022"

From GlueXWiki
Jump to: navigation, search
(Agenda)
 
(11 intermediate revisions by 2 users not shown)
Line 8: Line 8:
 
** [https://halldweb.jlab.org/wiki/images/4/4f/Glue-jefxd-igal-jaegle-05082022.pdf New IA vs old IA] -- ig
 
** [https://halldweb.jlab.org/wiki/images/4/4f/Glue-jefxd-igal-jaegle-05082022.pdf New IA vs old IA] -- ig
 
* Preparation of parts for FCAL2 modules -- Sasha
 
* Preparation of parts for FCAL2 modules -- Sasha
* Meeting with the DSG group. Mindy and George will continue working on the project.
+
** [https://halldweb.jlab.org/wiki/index.php/CRYTUR Received 25 crystals from CRYTUR] (last from our 2nd order).
 +
** Meeting with the DSG group [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/8_5_22/fcal_status_8_2_22.pdf]. Mindy and George will continue working on the project.
 
**[https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/part_preparation.pdf Preparation of parts][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students1.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students2.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students3.jpg]
 
**[https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/part_preparation.pdf Preparation of parts][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students1.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students2.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/students3.jpg]
 
*** Preshaping ESR foils (with the DSG)
 
*** Preshaping ESR foils (with the DSG)
Line 19: Line 20:
 
*** <span style="color:#FF0000"> All currently available </span> (consider to borrow some spares from NPS)
 
*** <span style="color:#FF0000"> All currently available </span> (consider to borrow some spares from NPS)
 
* Module fabrication  -- Sasha
 
* Module fabrication  -- Sasha
 +
** Received 85 PMT housings from Tim, they have been honed by Bobby. All of them will be used today.
 
** [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 1121 </span>  
 
** Fabricated modules: <span style="color:#FF0000"> Total 1121 </span>  
 
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 577 SICCAS]  
 
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 577 SICCAS]  
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 487 CRYTUR], Remaining: 167
+
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 544 CRYTUR], Remaining: 133
** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/6_17_22/clean_room.jpg Clean room EEL126]
+
** Clean room EEL126 [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/8_5_22/eel_shelves.jpg][https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/8_5_22/eel_shelves1.jpg]
 +
*** Expect to move to the new lab EEL108 (the same building) [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/8_5_22/eel_108.jpg]
 +
*** Work on amending safety docs
 
* Light Monitoring System -- Arshak
 
* Light Monitoring System -- Arshak
 +
 +
=Minutes=
 +
Attendees: Phil, Tegan, Zisis, Liping, Jon, Olga, Jane, Susan, Sasha, S.T.
 +
* Simon presented slides by Igal that compared the performance of the new implementation of the Island Algorithm (IA) for FCAL1/2 to the default (DA) FCAL1 algorithm
 +
** Looked at close clusters with one cluster energy fixed and varying energies of the second cluster, measuring the separation for the cases where 2 showers were returned by the reconstruction code
 +
*** The maximum efficiency, especially for the FCAL1 case, is measurably lower than one for all separations (probably due to material before the FCAL)
 +
*** For IA, the separation at which the efficiency drops off for smaller separations depends on the relative energy between the two clusters
 +
*** The log-weighting method does not work properly for either DA or IA
 +
*** The center-of-gravity weighting method for DA leads to multiple humps in the reconstructed separation distribution for FCAL2
 +
** Igal also looked at separations using the CCAL shower code with a large CCAL replacing the FCAL
 +
*** log- and center-of-gravity weighting look the same
 +
*** Sees a bias away from true separations at lower separations
 +
*** Maximum efficiency higher than FCAL1/2 results; could be due to material
 +
*** (After the meeting) results don't seem to agree with previous results from Ilya using HyCAL data
 +
* Preparation/Construction of FCAL2 modules continues
 +
** Received 25 modules from Crytur, expect more in the future, ~50 /month
 +
** Light guides coming next month
 +
** PMT housings arrived
 +
** Brass straps no longer bottleneck
 +
** 664 Crytur crystals now wrapped
 +
** Grand total of fabricated modules up to 1121
 +
*** Have components for module fabrication for 33/133 remaining crystals
 +
* Plan to move to new area in EEL, currently not ready
 +
* PMT dividers will be ordered next fiscal year
 +
** NPS see noise issues, but they are using a larger amplifier gain than we anticipate
 +
** GWU to help out with divider studies
 +
* Plan to meet with Tim regarding installation schedule for next year
 +
** Frame design finalized
 +
** Also need to discuss cabling with Fernando -- thickness of cables, stress relief
 +
* Refurbishment of lead glass blocks, Cockroft-Walton bases?
 +
* Budget for next year needs to include money for LMS, also spare crystals?

Latest revision as of 23:22, 11 August 2022

Meeting time and location=

  • 9:30 am EST (JLab time) remote only
  • Zoom meeting ID: 161 050 9142 Passcode: 004965

Agenda

  • Simulations/Analysis
  • Preparation of parts for FCAL2 modules -- Sasha
  • Module fabrication -- Sasha
    • Received 85 PMT housings from Tim, they have been honed by Bobby. All of them will be used today.
    • Status of fabrication
    • Fabricated modules: Total 1121
    • Clean room EEL126 [5][6]
      • Expect to move to the new lab EEL108 (the same building) [7]
      • Work on amending safety docs
  • Light Monitoring System -- Arshak

Minutes

Attendees: Phil, Tegan, Zisis, Liping, Jon, Olga, Jane, Susan, Sasha, S.T.

  • Simon presented slides by Igal that compared the performance of the new implementation of the Island Algorithm (IA) for FCAL1/2 to the default (DA) FCAL1 algorithm
    • Looked at close clusters with one cluster energy fixed and varying energies of the second cluster, measuring the separation for the cases where 2 showers were returned by the reconstruction code
      • The maximum efficiency, especially for the FCAL1 case, is measurably lower than one for all separations (probably due to material before the FCAL)
      • For IA, the separation at which the efficiency drops off for smaller separations depends on the relative energy between the two clusters
      • The log-weighting method does not work properly for either DA or IA
      • The center-of-gravity weighting method for DA leads to multiple humps in the reconstructed separation distribution for FCAL2
    • Igal also looked at separations using the CCAL shower code with a large CCAL replacing the FCAL
      • log- and center-of-gravity weighting look the same
      • Sees a bias away from true separations at lower separations
      • Maximum efficiency higher than FCAL1/2 results; could be due to material
      • (After the meeting) results don't seem to agree with previous results from Ilya using HyCAL data
  • Preparation/Construction of FCAL2 modules continues
    • Received 25 modules from Crytur, expect more in the future, ~50 /month
    • Light guides coming next month
    • PMT housings arrived
    • Brass straps no longer bottleneck
    • 664 Crytur crystals now wrapped
    • Grand total of fabricated modules up to 1121
      • Have components for module fabrication for 33/133 remaining crystals
  • Plan to move to new area in EEL, currently not ready
  • PMT dividers will be ordered next fiscal year
    • NPS see noise issues, but they are using a larger amplifier gain than we anticipate
    • GWU to help out with divider studies
  • Plan to meet with Tim regarding installation schedule for next year
    • Frame design finalized
    • Also need to discuss cabling with Fernando -- thickness of cables, stress relief
  • Refurbishment of lead glass blocks, Cockroft-Walton bases?
  • Budget for next year needs to include money for LMS, also spare crystals?