Difference between revisions of "JEF meeting, January 7, 2022"

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:: - [https://halldweb.jlab.org/DocDB/0054/005405/001/JAN06_mass_cut_comparison.pdf FCAL mass cut and energy comparisons] -- Tegan
 
:: - [https://halldweb.jlab.org/DocDB/0054/005405/001/JAN06_mass_cut_comparison.pdf FCAL mass cut and energy comparisons] -- Tegan
 
:: - [https://halldweb.jlab.org/wiki/images/a/ad/Glue-jefxd-igal-jaegle-07012021.pdf eta to gg pi0's update] -- ig
 
:: - [https://halldweb.jlab.org/wiki/images/a/ad/Glue-jefxd-igal-jaegle-07012021.pdf eta to gg pi0's update] -- ig
 +
 +
=Minutes=
 +
Attendees:  Igal, Arshak, Tegan, Olga, Susan, Sasha, Bill, Azizah, Liping, Jon, Jane, Zisis, S.T.
 +
* Sasha had email exchange with SICCAS late last year; plan to meet next week to get update
 +
* Sasha working on inventory for module construction; plan to resume module construction
 +
** Plan to follow up with Patrizia regarding help from detector support group
 +
** Tim's group busy with CPP but Chris A. will have time to work on brazing
 +
* Final layout from PMT divider from Fernando; plan for tests in the lab soon;
 +
** Fernando currently looking for appropriate HV and LV connectors-- prototype in 2-3 weeks?
 +
* Sasha working on paperwork for GWU and UNCW
 +
* COMCAL has been moved from platform in hall
 +
** Will be reinstalled for PrimeX (after CPP run, but during CPP might be opportunity to test new PMT divider design)
 +
* Arshak will work on LMS (need to choose design: plexiglas plate a la FCAL or fibers?)
 +
* Tegan looked at efficiency for single photon reconstruction using island algorithm as function of angle and photon energy
 +
** Dip at 4 degrees seen for 1 GeV photons but not higher energy photons
 +
** Efficiency in lead glass region (>5 degrees) is noticeably lower than in the insert region
 +
*** Suspicion is that this due to conversions in the material in between target and FCAL
 +
* Igal gave an update on η→π0γγ analysis
 +
** Applied TOF veto (by looking for FCAL-TOF matches for clusters and TOF points not already associated with tracks):  this reduces the 2γ peaking background
 +
** Maybe MVA not needed if veto applied?
 +
** Need to define better FOM?

Revision as of 15:56, 7 January 2022

Meeting time and location

Agenda

  • SICCAS crystals
  • Module fabrication
  • Light Monitoring System
  • COMCAL tests, TAC running, etc.
  • Data analysis
  • Simulations
- FCAL mass cut and energy comparisons -- Tegan
- eta to gg pi0's update -- ig

Minutes

Attendees: Igal, Arshak, Tegan, Olga, Susan, Sasha, Bill, Azizah, Liping, Jon, Jane, Zisis, S.T.

  • Sasha had email exchange with SICCAS late last year; plan to meet next week to get update
  • Sasha working on inventory for module construction; plan to resume module construction
    • Plan to follow up with Patrizia regarding help from detector support group
    • Tim's group busy with CPP but Chris A. will have time to work on brazing
  • Final layout from PMT divider from Fernando; plan for tests in the lab soon;
    • Fernando currently looking for appropriate HV and LV connectors-- prototype in 2-3 weeks?
  • Sasha working on paperwork for GWU and UNCW
  • COMCAL has been moved from platform in hall
    • Will be reinstalled for PrimeX (after CPP run, but during CPP might be opportunity to test new PMT divider design)
  • Arshak will work on LMS (need to choose design: plexiglas plate a la FCAL or fibers?)
  • Tegan looked at efficiency for single photon reconstruction using island algorithm as function of angle and photon energy
    • Dip at 4 degrees seen for 1 GeV photons but not higher energy photons
    • Efficiency in lead glass region (>5 degrees) is noticeably lower than in the insert region
      • Suspicion is that this due to conversions in the material in between target and FCAL
  • Igal gave an update on η→π0γγ analysis
    • Applied TOF veto (by looking for FCAL-TOF matches for clusters and TOF points not already associated with tracks): this reduces the 2γ peaking background
    • Maybe MVA not needed if veto applied?
    • Need to define better FOM?