Difference between revisions of "May 21, 2015 Calorimetry"

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= Minutes =
 
= Minutes =
  
−
''Attendees:Elton, Jon, Manuel, Adesh, Will, David (JLab);  
+
''Attendees:Elton, Jon, Manuel, Adesh, Will, David (JLab); Christina, George (Athens); Zisis, Tegan, Ahmed (Regina)
  
 
# Announcements
 
# Announcements
 +
#* Aram Teymurazyan has been hired into the department at Regina as the Fedoruk Chair in Nuclear Imaging (starting July 1)
 
# Action Items
 
# Action Items
 +
#* Orlando has straightened out the issues with the cryptocard and will work on the FCAL pulser system
 
# FCAL Update
 
# FCAL Update
 +
## Hardware (Manuel)
 +
##* Hovanes has updated the EPICs IOCs to turn off bases that read above some max voltage (e.g. 2000 V) after verifying the anomalous reading after a preset delay (about 15 s).
 +
##* (Jon) Working on a more permanent fix to this problem by updating the firmware with better diagnostics.
 +
## Calibration (Adesh)
 +
##* Working on pi0 and electron calibrations.
 +
##* Looking for pi0 at lower energy threshold and investigating systematics
 +
##* So far charged track showers are included in the samples. Updating software to veto showers connected to charged trcks
 +
##* Considering Bfield=0 runs, which may be used to add to the number of pi0s
 +
## Will: Consider adding skim files together into one (using evio_merge_files) to reduce the total number of jobs that need submission
 +
##* BCAL is also using qlite files for keeping intermediate values of constants during iterations
 +
## Charged particle showers (Elton)
 +
##*  Posted some plots on charge track matching to FCAL in [https://logbooks.jlab.org/entry/3341857 Log Entry 3341857].
 +
##* There seems to be a cutoff in the momentum (not FCAL shower energy). In conversations with Simon, it may be that this is due to a tracking inefficiency at low angles, which he will investigate. Adesh: Does not see the same cutoff, but requires hits 20 cm < r  < 60 cm, which result in apparent cutoff at higher energy.
 +
##* The measured width of the FCAL energy in single counters requiring that the momentum lie between 0.975 < p < 1.025 GeV is about 25-30%. Adesh sees widths of order 12%. Elton will redo plots excluding showers close to the beam hole.
 +
##* Adesh: Investigates energy in a single block for tracks matching showers. They appear very uniform at about 50% of the momentum.
 +
##* The pi0 width is about 11-12% for the spring data. Fall data will be inspected next.
 
# BCAL Update
 
# BCAL Update
 
#* See  [https://logbooks.jlab.org/entry/3341096 Log Entry 334096] Problematic FADC channel  
 
#* See  [https://logbooks.jlab.org/entry/3341096 Log Entry 334096] Problematic FADC channel  

Revision as of 15:19, 21 May 2015

Video Conferencing Information

Meeting Time: 11 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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  4. Upon connection all microphones are automatically muted. To unmute your mike on a Polycom or equivalent unit, enter *4. Unmuting on a computer is trivial as there is a microphone button than can be clicked.
  5. More information on connecting to bluejeans is available.

Participant Direct Lines

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

Action Items

  1. Work with Hovanes to activate VME LED pulser setup for FCAL (Elton). Postpone till mid May, after current run.

References

  1. FCAL HDFCAL log book
  2. BCAL HDBCAL log book
  3. BCAL Action Items and Working Tasks

Tentative Agenda

  1. Announcements
  2. Action Items
  3. FCAL Update
  4. BCAL Update
  5. Summer plans
  6. Reconstruction and Simulation
    1. Wavetrain code vs. single-energy code (Tegan)
    2. IU and CURVATURE Shower Comparison (Tegan)
  7. Calibration
  8. Any other business

Minutes

Attendees:Elton, Jon, Manuel, Adesh, Will, David (JLab); Christina, George (Athens); Zisis, Tegan, Ahmed (Regina)

  1. Announcements
    • Aram Teymurazyan has been hired into the department at Regina as the Fedoruk Chair in Nuclear Imaging (starting July 1)
  2. Action Items
    • Orlando has straightened out the issues with the cryptocard and will work on the FCAL pulser system
  3. FCAL Update
    1. Hardware (Manuel)
      • Hovanes has updated the EPICs IOCs to turn off bases that read above some max voltage (e.g. 2000 V) after verifying the anomalous reading after a preset delay (about 15 s).
      • (Jon) Working on a more permanent fix to this problem by updating the firmware with better diagnostics.
    2. Calibration (Adesh)
      • Working on pi0 and electron calibrations.
      • Looking for pi0 at lower energy threshold and investigating systematics
      • So far charged track showers are included in the samples. Updating software to veto showers connected to charged trcks
      • Considering Bfield=0 runs, which may be used to add to the number of pi0s
    3. Will: Consider adding skim files together into one (using evio_merge_files) to reduce the total number of jobs that need submission
      • BCAL is also using qlite files for keeping intermediate values of constants during iterations
    4. Charged particle showers (Elton)
      • Posted some plots on charge track matching to FCAL in Log Entry 3341857.
      • There seems to be a cutoff in the momentum (not FCAL shower energy). In conversations with Simon, it may be that this is due to a tracking inefficiency at low angles, which he will investigate. Adesh: Does not see the same cutoff, but requires hits 20 cm < r < 60 cm, which result in apparent cutoff at higher energy.
      • The measured width of the FCAL energy in single counters requiring that the momentum lie between 0.975 < p < 1.025 GeV is about 25-30%. Adesh sees widths of order 12%. Elton will redo plots excluding showers close to the beam hole.
      • Adesh: Investigates energy in a single block for tracks matching showers. They appear very uniform at about 50% of the momentum.
      • The pi0 width is about 11-12% for the spring data. Fall data will be inspected next.
  4. BCAL Update
  5. Summer plans
  6. Reconstruction and Simulation
    1. Wavetrain code vs. single-energy code (Tegan)
    2. IU and CURVATURE Shower Comparison (Tegan)
  7. Calibration
  8. Any other business
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