Apr 16, 2020 Calorimeter

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Meeting Time: 11:00 a.m.

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/907185247.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 907185247.
  3. To join via phone, use one of the following numbers and the Conference ID: 907185247.
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Participant Direct Lines

  • JLab Phone in CC L207 is 757-269-7084 (usual room)
  • JLab Phone: in CC F326 is 757-269-6460
  • Phone in the Regina Video-conference Suite is 306-585-4204
  • Athens Phone: in Christina's office is 011-30-210-727-6947

References

  1. FCAL HDFCAL log book
  2. BCAL HDBCAL log book

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. Check switches on FCAL board with high scaler rates and make sure it is set to 2 V full scale. (Colin and Sasha)

Long term items

Tentative Agenda

  1. Announcements
  2. Action Items
  3. Run Updates
    1. FCAL
    2. BCAL
  4. Calibrations
    • Batch 1: 71350 - 71591 (150, 250 nA)
    • Batch 2: 71592 - 71727 (350 nA)
    1. Gain calibration (Karthik) - GainsSpring2020B2
    2. Nonlinearity corrections (Karthik) - Plots shown are after applying nonlinear corrections NonlinearSpring2020B2
    • Batch 3: 71728 - 71835 (350 nA)
    • PrimEx Calibration PrimExupdate
  5. Monitoring
    1. BCAL-LED update (Varun)[2]
    2. Summary of batch 1 2019-11 run - BCAL (Tolga) [3]
  6. Reconstruction
  7. Efficiencies
  8. Simulations
  9. NIM articles
  10. Any other business

Minutes

Attending: Colin, Mark, Tolga, Varun, Karthik, Zisis, Curtis, Sean, Elton, Matt, Igal, Christina, Jon, Susan, Sasha, Chandra"

  1. Announcements
    1. Elton announced that is entering phased retirement, starting in August. Zisis will take over the CALWG Meetings starting today and it is likely that Mark will take over Elton's duties in Hall D, in due time.
    2. Sean mentioned that the monitoring launch for spring 2020 Batch 1 went well. Tolga and Susan looked at the BCAL. On Friday, Batch 2 and 3 will be launched, provided nobody puts a stop to that.
  2. Action Items
    1. Colin said that the action item above will be dealt with once MEDCON restrictions have been lifted.
  3. Run Updates
    1. FCAL: none
    2. BCAL: none
  4. Calibrations
    1. Gain calibration (Karthik):
      • Batch 1: 71350 - 71591 (150, 250 nA); Batch 2: 71592 - 71727 (350 nA); Batch 3: 71728 - 71835 (350 nA)
    2. Nonlinearity corrections (Karthik):
    • PrimEx Calibration (Karthik):
  5. Monitoring
    1. BCAL-LED update (Varun):
    2. Summary of batch 1 Monitoring 2019-11 run - BCAL (Tolga):
  6. Reconstruction
  7. Efficiencies
  8. Simulations
    • Pi0 mass in BCAL: Jon is about 2.5 MeV lower when magnetic field is off (geant4)
  9. NIM articles
  10. Any other business