January 19, 2022 Calorimeter

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Meeting Day/Time: every other WEDNESDAY at 11:00 a.m. JLab time

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       Meeting ID: 160 855 2106
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  1. FCAL HDFCAL log book
  2. BCAL HDBCAL log book
  3. CCAL HDCCAL log book
  4. Calibrations: 2020 Data Production; RunPeriod-2019-11 Validation; Offline Monitoring Data Validation
  5. Photon Reconstruction Task Force

Goals for Calorimetry Group

  1. Determine preliminary photon reconstruction efficiencies as a function of E, phi and theta in data and simulation with a point-to-point precision of at least 5%.
  2. Measure systematics of pi0/eta mass calibration as a function of detector position to a precision of at least 5 MeV.
  3. Demonstrate agreement of photon reconstruction efficiency and resolution between data and simulation as a function of E, phi and theta to within 5%.

Action Items

  1. Short term CALWG Items
  2. Long term items
  3. Calorimeter work packages
  4. AI - BCAL Monitoring:
    1. Hydra Real-Time Dashboard
    2. Hydra 24-hr Monitoring Logs

Tentative Agenda

  1. Announcements
  2. Past Meeting Minutes
  3. Shutdown tasks
    1. Evaluation of hardware (Matt's email 2022-01-10) for February Collaboration Meeting
    2. Review Action Items
  4. Run Operations
    1. FCAL
    2. BCAL
    3. CCAL
  5. Calibration
    1. FCAL, SRC FCAL time/energy calibrations
  6. Monitoring
    1. BCAL LED, page 4 energy
    2. BCAL (offline)
      1. Update on Version 1 Batch 04 (Tolga) [1]
    3. FCAL (offline)
      1. Update on Version 1 Batch 04 (Susan)
    4. CCAL (offline)
  7. Reconstruction
    1. BCAL Efficiency - continuity[Churamani:will update about TnP/gun study][2]
  8. Simulations
    1. FCAL LED efficiency maps
  9. Action Items
    1. FCAL: pi0 mass shifts, LED pulser at high rate
  10. Any other business


Attendees: Mark, Matt, Varun, Igal, Tolga, Susan, Stjepan, Karthik, Churamani, Jon, Malte, Eugene, Rebecca, Zisis; Regrets: Elton

  1. Announcements
    1. Mark mentioned that bases were installed in Hall D's radiation environment: [3]
  2. Past Meeting Minutes
    1. Zisis went over the minutes from our previous meeting. Mark added that the next monitoring launch has not been done yet.
  3. Shutdown tasks
    1. Evaluation of GlueX hardware longevity: Matt summarized that this exercise does not have to have definitive answers by the Feb Collaboration meeting, but rather we are trying to be proactive and exploit large shutdowns in the future (2023, 2025).
    2. Review Action Items: will be done by Mark and Zisis over the next couple of weeks.
  4. Run Operations: no report.
  5. Calibration
    1. Zisis mentioned that Karthik has gathered links to BCAL calibration presentations from 2020 and PrimEx and those have been placed on the BCAL calibration links, 2020, PrimEx, SRC Wiki page; and added to the References above, from Feb 2, 2022 and on.
    2. Igal gave an update on the SRC FCAL time/energy calibrations for those runs marked as 'stable'. The π0 mass converges quickly and the width does as well. This is the first pass without the tagger, which should help reduce the background.
  6. Monitoring
    1. Igal showed BCAL LED plots from SRC. They look quite good: within 1% of expected value. A decreasing trend is seen as a function of run number.
    2. BCAL (offline): Tolga gave an update on Version 1 Batch 04 for runs with full and MT target, Occupancy and Recon1 plots work well, the others only when the chambers are on. Some spikes were pointed out, and on slide 3 a bump on the TDC occupancy layer for Modules below no. 20, which Mark explained being a result of PS e+e-; shielding/screens helped with that. See logbook entries [4], [5], and [6].
    3. FCAL (offline): Susan gave an update on the FCAL monitoring, version 1 batch 4. FCAL looks ok, and most plots (high current-target full, high current-target MT, and low current-target MT) look uneventful.
    4. CCAL (offline): no report.
  7. Reconstruction: Churamani gave an update on the BCAL Efficiency using the TnP/gun method. His plots were compared to Jon's past study. A data-to-MC discrepancy remains. The work is ongoing.
  8. Simulations: no report.
  9. Action Items: see shutdown takes above.
  10. Any other business: none.