Difference between revisions of "JEF meeting, May 3, 2024"

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*9:30 am EST (JLab time) remote only
 
*9:30 am EST (JLab time) remote only
 
* [https://halldweb.jlab.org/wiki-private/index.php/JEF_Weekly_Meeting#Connection_information Connection information]
 
* [https://halldweb.jlab.org/wiki-private/index.php/JEF_Weekly_Meeting#Connection_information Connection information]
−
 
 
*'''Preparation of parts for ECAL''' -- Sasha  
 
*'''Preparation of parts for ECAL''' -- Sasha  
 +
** - signal cables -  done
 +
** - signal patch panel [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/10_13_2023/signal_patch_panel.jpg ] - done
 +
** - HV short cables: received, checked, labeled (last week)
 +
** - HV long cable, 18 ready (out of 36)
 +
** - HV distribution boards: in preparation
 +
** - LV cables: waiting for about 160 cables (will need to test, label, and bundle)
 +
** - LV distribution boards [https://halldweb.jlab.org/detectors/fcal2/cables/lv_distribution/lv_dist_board.jpg ]. Have to populate with connectors, and design a box around the PCB
 +
** - Chris S. is working on the prototype of the LED board. Currently 5 blue LEDs, consider to add red LEDs as well
 
* '''Ongoing projects'''  
 
* '''Ongoing projects'''  
 +
** - Bundling short cables (groups of 7, 7, and 6 cables): signal (done), HV (done), LV (36 layers done, waiting for cables) [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/04_26_2024]
 +
**  - [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/05_03_2024/[[]] Update from Laveen]
 +
* '''[[Testing of PMT dividers]]''' -- Sasha / Vlad / George / Mindy
 +
** - Testing procedure [https://halldweb.jlab.org/detectors/fcal2/dividers/divider_test_guide.pptx]
 +
** - Mindy has finished with preparing all sockets (~1650) !
 +
** - All dividers have been fabricated and tested by George [https://halldweb.jlab.org/wiki/index.php/Final_test_of_dividers]
 +
*** decided to remove regulators on about 40 dividers
 +
** - Adding ECAL and updating FCAL translation table in the TT.DB (have to finish during this week)
 
* '''Installation of the FCAL2 detector & integration to GlueX''' -- Sasha / Vlad / Hakob / Laveen  
 
* '''Installation of the FCAL2 detector & integration to GlueX''' -- Sasha / Vlad / Hakob / Laveen  
 +
** <span style="color: red"> Installation of the LMS has been completed </span>  [https://logbooks.jlab.org/entry/4282307]
 +
** Installation and testing cables and dividers [https://logbooks.jlab.org/entry/4293662][https://logbooks.jlab.org/entry/4295312]
 +
** All crates are connected to the network switch Ethernet switch [https://logbooks.jlab.org/entry/4295336]
 +
** Preparing for testing installed dividers
 +
** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page]
 +
*** (links from the previous meetings [https://logbooks.jlab.org/book/halld][https://halldweb.jlab.org/detectors/fcal2/installation/photos/install_fcal/students_detector1.jpg][https://halldweb.jlab.org/detectors/fcal2/installation/photos/install_fcal/students_detector.jpg])
 +
** '''Preparation for beam tests with the PS'''
 +
***  measure shower beam profile
 +
***  shower reconstruction between PbWO4 and LG
 
** '''Other hardware projects'''
 
** '''Other hardware projects'''
 +
*** --prototype of the ECAL veto counter
 +
*** --study shower profile using PS (also transition region between lead tungstate and LG modules (?) )
 +
*'''FCAL2 poster for open house?'''
 +
** JEF/ECAL/FCAL poster 
 
*'''Analysis/Simulation'''
 
*'''Analysis/Simulation'''
 +
** [https://halldweb.jlab.org/wiki/images/9/93/Glue-jefxd-igal-jaegle-03052024.pdf eta to ggpi0's update] -- ig
 +
 +
=Minutes=
 +
Attendees: Igal, Liping, Olga, Laveen, Bill, Sasha, Vlad, Stjepan, Zisis, Jane, Jon, S.T.
 +
* Laveen reported that 50 more  LV cables have been labelled and tested, still need 110
 +
** 6 layers of PMT dividers have been installed and tested
 +
*** Dark room made dark using tedlar and plates
 +
*** Bypassed amplifier
 +
*** Set 1kV HV (close to nominal voltage; expect ~920V when have amplifier installed)
 +
**** Issue with CAEN HV interlock needs to be resolved
 +
*** Use LMS with 7V on LEDs to provide light input, look at signals on oscilloscope
 +
*** Found a few problems: swapped signal cables; one HV cable not able to hold HV, needed to be swapped out
 +
** Ethernet cables for 7 crates have been installed, connected all crates to switch
 +
* PMT dividers all fabricated and tested
 +
** Plan to increase number with regulator removed
 +
** Plan to install and test one layer of PMTs at a time; can do one layer every 1-2 days
 +
** Need HV control to be implemented in CSS
 +
* Chiller installation underway, need final plumbing, would like to be operational for full testing of insert (okay for now for short-duration testing)
 +
* Igal gave an update on &eta;&rarr;&pi;0&gamma;&gamma;
 +
** Went over GAMS results
 +
*** Highest measured BR for &eta;&rarr;&pi;0&gamma;&gamma;
 +
*** Saw &eta;'&rarr;&omega;&gamma;, &omega;&rarr;&pi;+&pi;-&pi;0 but &omega;&rarr;&pi;0&gamma; not shown
 +
*** Strict cuts to isolate signal
 +
** Went over A2 results
 +
*** Background due to 2&pi;0
 +
*** Suppress &eta;&rarr;3&pi;0 background with shower effective radius cut
 +
** &eta;' possible good reference channel
 +
** Discussed contributions to &eta;&rarr;2&gamma; peaking background (shower splitting + conversions (which we can suppress using TOF veto))
 +
** Introduce PINN (physics-informed neutal network)
 +
** Looked at spring 2017 data -- no obvious signal seen

Latest revision as of 14:08, 6 May 2024

Meeting time and location:

  • 9:30 am EST (JLab time) remote only
  • Connection information
  • Preparation of parts for ECAL -- Sasha
    • - signal cables - done
    • - signal patch panel [1] - done
    • - HV short cables: received, checked, labeled (last week)
    • - HV long cable, 18 ready (out of 36)
    • - HV distribution boards: in preparation
    • - LV cables: waiting for about 160 cables (will need to test, label, and bundle)
    • - LV distribution boards [2]. Have to populate with connectors, and design a box around the PCB
    • - Chris S. is working on the prototype of the LED board. Currently 5 blue LEDs, consider to add red LEDs as well
  • Ongoing projects
    • - Bundling short cables (groups of 7, 7, and 6 cables): signal (done), HV (done), LV (36 layers done, waiting for cables) [3]
    • - [[] Update from Laveen]
  • Testing of PMT dividers -- Sasha / Vlad / George / Mindy
    • - Testing procedure [4]
    • - Mindy has finished with preparing all sockets (~1650) !
    • - All dividers have been fabricated and tested by George [5]
      • decided to remove regulators on about 40 dividers
    • - Adding ECAL and updating FCAL translation table in the TT.DB (have to finish during this week)
  • Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen
    • Installation of the LMS has been completed [6]
    • Installation and testing cables and dividers [7][8]
    • All crates are connected to the network switch Ethernet switch [9]
    • Preparing for testing installed dividers
    • Detector installation page
    • Preparation for beam tests with the PS
      • measure shower beam profile
      • shower reconstruction between PbWO4 and LG
    • Other hardware projects
      • --prototype of the ECAL veto counter
      • --study shower profile using PS (also transition region between lead tungstate and LG modules (?) )
  • FCAL2 poster for open house?
    • JEF/ECAL/FCAL poster
  • Analysis/Simulation

Minutes

Attendees: Igal, Liping, Olga, Laveen, Bill, Sasha, Vlad, Stjepan, Zisis, Jane, Jon, S.T.

  • Laveen reported that 50 more LV cables have been labelled and tested, still need 110
    • 6 layers of PMT dividers have been installed and tested
      • Dark room made dark using tedlar and plates
      • Bypassed amplifier
      • Set 1kV HV (close to nominal voltage; expect ~920V when have amplifier installed)
        • Issue with CAEN HV interlock needs to be resolved
      • Use LMS with 7V on LEDs to provide light input, look at signals on oscilloscope
      • Found a few problems: swapped signal cables; one HV cable not able to hold HV, needed to be swapped out
    • Ethernet cables for 7 crates have been installed, connected all crates to switch
  • PMT dividers all fabricated and tested
    • Plan to increase number with regulator removed
    • Plan to install and test one layer of PMTs at a time; can do one layer every 1-2 days
    • Need HV control to be implemented in CSS
  • Chiller installation underway, need final plumbing, would like to be operational for full testing of insert (okay for now for short-duration testing)
  • Igal gave an update on η→π0γγ
    • Went over GAMS results
      • Highest measured BR for η→π0γγ
      • Saw η'→ωγ, ω→π+π-π0 but ω→π0γ not shown
      • Strict cuts to isolate signal
    • Went over A2 results
      • Background due to 2π0
      • Suppress η→3π0 background with shower effective radius cut
    • η' possible good reference channel
    • Discussed contributions to η→2γ peaking background (shower splitting + conversions (which we can suppress using TOF veto))
    • Introduce PINN (physics-informed neutal network)
    • Looked at spring 2017 data -- no obvious signal seen
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