Difference between revisions of "Jan 23, 2020 Calorimeter"

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(Created page with "''<font color=red>Meeting Time: 11:00 a.m.</font>'' # To join via a Web Browser, go to the page [https://bluejeans.com/907185247] https://bluejeans.com/907185247. # To join v...")
 
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[[Long term items]]:
 
[[Long term items]]:
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# From Mike's work: -cos(phi) type dependence in the data and a phi dependence at the downstream end of the bcal. See [[Sep 21, 2017 Calorimeter]] Meeting.
 
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# FCAL: It has been noticed that the pi0 mass shifts when the LED pulser runs at high rate. This is still not understood. See [https://logbooks.jlab.org/entry/3595928 Log Entry 3595928] and references.  Several runs have been taken in raw mode.  These runs exhibit the shift in pi0 mass with LED running at 1 kHz.  There is a need to analyze these to try to determine the cause:
 
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##50634 - FCAL Green LED: 1kHz, 29 V, Livetime is 9%, 1.7 M events
 
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##50635 - FCAL Violet LED: 1kHz, 22 V, Livetime is 9%, 1.4 M events
 
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##50636 - FCAL Blue LED: 1kHz, 15 V, Livetime is 9%, 1.5 M events
 
  
 
= Tentative Agenda =
 
= Tentative Agenda =

Revision as of 16:50, 9 January 2020

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.
    • US or Canada: +1 408 740 7256 or
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  5. More information on connecting to bluejeans is available.

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 east 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

Short term items:

  1. Proposal for updating BCAL gain constants 2019 / extrapolation to higher energy (Karthik)
  2. Systematically fix labels on FCAL crates (Colin/Elton)
  3. Ship back bases to IU that fail repair (Colin)
  4. Order spare FCAL electronics (Elton)
  5. Complete Calorimeter work packages

Long term items:

Tentative Agenda

  1. Announcements
  2. Action Items
  3. Run Updates
    1. FCAL
    2. BCAL
  4. Calibrations
  5. Monitoring
  6. Reconstruction (Mark)
    • post processing (non-linearity, covariance matrices)
  7. Efficiencies
  8. Simulations
    • Geant4 BCAL reconstructed energy bad in runs < 40000? See github issue here (Jon)
  9. NIM articles
  10. Any other business

Minutes

Attending:

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