October 12, 2022 Calorimeter

From GlueXWiki
Revision as of 11:10, 20 October 2022 by Zisis (Talk | contribs) (Minutes)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

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

Connection instructions

Use ZoomGov: https://jlab-org.zoomgov.com/j/1608552106?pwd=UE1nZFIzUUZHVjJEVGJXTGdUYTV3UT09.
Our meeting ID number is 160 855 2106. Click "Expand" for more details.

  • Meeting ID: 160 855 2106 Passcode: 944454
  • One tap mobile
       +16692545252,,1608552106# US (San Jose)
       +16468287666,,1608552106# US (New York)
  • Dial by your location
       +1 669 254 5252 US (San Jose)
       +1 646 828 7666 US (New York)
       +1 551 285 1373 US
       +1 669 216 1590 US (San Jose)
       833 568 8864 US Toll-free (US West) (US East)
       Meeting ID: 160 855 2106
       Passcode: 944454


  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
  6. BCAL calibration links, 2020, PrimEx, SRC

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 resolution between data and simulation as a function of E, phi and theta to within 5%.
  4. Demonstrate agreement of photon reconstruction efficiency 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. Review Action Items
  4. Run Operations
    1. FCAL
    2. BCAL
    3. CCAL
  5. Calibration
  6. Monitoring
    1. BCAL LED Monitoring (online)
    2. BCAL (offline)
    3. FCAL (offline)
    4. CCAL (offline)
  7. Reconstruction
    1. Churamani: (Extracted BCAL Efficiencies)[1]
  8. Simulations
  9. Any other business


Attendees: Mark, Matt, Igal, Varun, Malte, Sean, Tolga, Churamani, Eugene, Sasha, Jon, Zisis

  1. Announcements: none.
  2. Past Meeting Minutes: Zisis reviewed the minutes. Routine operations/actions for BCAL and FCAL.
  3. Review Action Items: Mark and Zisis met earlier to review the above 'Goals for Calorimetry Group' and action items and packages. Zisis will email questions to Sean and Matt in connection to these, and update the lists.
  4. Run Operations
    1. FCAL:
      1. Operations: Mark reported nominal operation; 1-2 bases will be replaced tomorrow.
      2. JEF installation update: FCAL base change history. Mark reported that there are frequent meetings to deal with the unstacking of FCAL and the stacking of FCAL-II with a specific plan for each FCAL block.
      3. FCAL hole over 2 GeV Igal reported that this was a timing issue and has been resolved.
      4. FCAL PMT power law behaviour: see studies by Igal [2] and Mark [3]. Mark mentioned that these are useful to project the gain at a new HV based on the current gain. The results are clustered roughly in two groups. The new PMTs have a stronger signal; this variable is not included in this analysis. Future project: vary both HV and LED independently (time consuming).
    2. BCAL: Mark and Zisis reported that operations are nominal.
    3. CCAL: Sasha reported that all is good. No bad channels. CCAL is being calibrated for the different run periods. Possible tests in the spring using Fernando's modified divider base (active base with bypass amplifier); these 140 crystals will be used in FCAL-II.
  5. Calibration:
    1. PrimEx: Igal reported that he is working on PrimEX LED analysis to remove bad channels. He is using his own variation and will check the ccdb constants in when done.
    2. CPP: data allows calibration in 2-3 periods (beginning, middle, end). Large no of EVIO files needed to this end to get good enough statistics even when 'GlueX' trigger is used and a higher threshold.
  6. Monitoring
    1. BCAL LED Monitoring (online): Varun reported that all is nominal.
    2. BCAL (offline): Tolga is working on the particle gun. Sean suggested that he use the latest version of the software in MCWRAPPER.
    3. FCAL (offline): no report.
    4. CCAL (offline): no report.
  7. Reconstruction: Churamani gave an update on the extracted BCAL efficiencies with eta-prime/tag and probe method. He is now using two methods and comparing them. The MC for Method 1 has low stats; the current running is using genetaregge but throwing the particles to both FCAL and BCAL. Jon will provide instructions on how generate events only within the BCAL's acceptance.
  8. Simulations: no report.
  9. Any other business: none.