Difference between revisions of "Feb 6, 2020 Calorimeter"

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# Announcements
 
# Announcements
−
#* [[GlueX-Collaboration-Feb-2020|Collaboration Meeting]] February 13-15, 2020.
+
## [[GlueX-Collaboration-Feb-2020|Collaboration Meeting]] February 13-15, 2020.
−
#* Announcement at Production and Analysis meeting. Complete calibrations by April 1? See [https://halldweb.jlab.org/wiki/index.php/2020_Data_Production 2020 Data Production]
+
##* Jon has signed up to give the Cal report to the collaboration meeting. Please summarize any work to be presented in a few slides and send them to him so that he can assemble them.
 +
## Announcement at Production and Analysis meeting. Complete calibrations by April 1? See [https://halldweb.jlab.org/wiki/index.php/2020_Data_Production 2020 Data Production]
 +
##* The goal is to have the (initial) calibrations completed by April 1. Everyone has this on their schedule. There may be iterations required, but hopefully the current calibrations will be stable into this new run period.
 +
##* Curtis: We have now accumulated sufficient amount  amount of data at each of the three settings: 150, 250 and 350 nA. Elton: Note that this running period is at higher current and there might be impacts on the calibration for example from pileup.
 
# Action Items
 
# Action Items
 +
#* Bases were delivered to shipping. Matt noted that they were recently surveyed by RadCon, so they might be going out soon.
 +
#* Mark noted that no 4 ns timing shifts have been seen with the new firmware, but a careful look will come during calibrations.
 
# Run Updates
 
# Run Updates
 
## FCAL
 
## FCAL
 +
##* Run is going well. Base failure rate is low. At the moment there are no dead bases, although some are not delivering the full set voltage
 
## BCAL
 
## BCAL
 +
##* No issues with BCAL. The LED skim files are being produced routinely by the online system and Varun is checking the response daily.
 
# Calibrations
 
# Calibrations
−
## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4322 Toy MC to study non-linearities slides] (Elton).  See also [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4321 GlueX-doc-4321]
+
#* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4322 Toy MC to study non-linearities slides] (Elton).  See also [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4321 GlueX-doc-4321]
 +
#* Elton has posted a GlueX note on the toy MC to investigate non-linearities
 +
#* He went over the posted slides and ended with a list of suggestions for determining the non-linearity corrections. These can be checked once the initial gains are determined.
 +
#* Ideally one can determine the corrections at lower energy with symmetric decays and extend the measurements to higher energy with asymmetric decays.
 
# Monitoring
 
# Monitoring
 
# Reconstruction
 
# Reconstruction
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# Simulations
 
# Simulations
 
# NIM articles
 
# NIM articles
 +
#* NIM article on FCAL quality factor is nearing final revisions. Latest is a response to question/suggestion by Richard. They show the efficiency for pi0 vs the quality factor for data and BGGEN MC and find good agreement.
 
# Any other business
 
# Any other business

Latest revision as of 14:49, 6 February 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
    • US or Canada: +1 888 240 2560
  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 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

  1. Ship back bases to IU that fail repair (Colin) Bases left in shipping by Elton. Need to check that package was actually shipped .
  2. Check that the 4ns shifts in the BCAL FADCs is absent with the new firmware (Mark) No issues seen, but will check during normal calibrations
  3. Complete Calorimeter work packages

Long term items

Tentative Agenda

  1. Announcements
  2. Action Items
  3. Run Updates
    1. FCAL
    2. BCAL
  4. Calibrations
    1. Toy MC to study non-linearities slides (Elton). See also GlueX-doc-4321
  5. Monitoring
  6. Reconstruction
  7. Efficiencies
  8. Simulations
  9. NIM articles
  10. Any other business

Minutes

Attending: Elton, Colin, Mark (JLab); Karthik, Varun, Zisis (UofR); Sean (FSU); Curtis (CMU); Matt (IU).

  1. Announcements
    1. Collaboration Meeting February 13-15, 2020.
      • Jon has signed up to give the Cal report to the collaboration meeting. Please summarize any work to be presented in a few slides and send them to him so that he can assemble them.
    2. Announcement at Production and Analysis meeting. Complete calibrations by April 1? See 2020 Data Production
      • The goal is to have the (initial) calibrations completed by April 1. Everyone has this on their schedule. There may be iterations required, but hopefully the current calibrations will be stable into this new run period.
      • Curtis: We have now accumulated sufficient amount amount of data at each of the three settings: 150, 250 and 350 nA. Elton: Note that this running period is at higher current and there might be impacts on the calibration for example from pileup.
  2. Action Items
    • Bases were delivered to shipping. Matt noted that they were recently surveyed by RadCon, so they might be going out soon.
    • Mark noted that no 4 ns timing shifts have been seen with the new firmware, but a careful look will come during calibrations.
  3. Run Updates
    1. FCAL
      • Run is going well. Base failure rate is low. At the moment there are no dead bases, although some are not delivering the full set voltage
    2. BCAL
      • No issues with BCAL. The LED skim files are being produced routinely by the online system and Varun is checking the response daily.
  4. Calibrations
    • Toy MC to study non-linearities slides (Elton). See also GlueX-doc-4321
    • Elton has posted a GlueX note on the toy MC to investigate non-linearities
    • He went over the posted slides and ended with a list of suggestions for determining the non-linearity corrections. These can be checked once the initial gains are determined.
    • Ideally one can determine the corrections at lower energy with symmetric decays and extend the measurements to higher energy with asymmetric decays.
  5. Monitoring
  6. Reconstruction
  7. Efficiencies
  8. Simulations
  9. NIM articles
    • NIM article on FCAL quality factor is nearing final revisions. Latest is a response to question/suggestion by Richard. They show the efficiency for pi0 vs the quality factor for data and BGGEN MC and find good agreement.
  10. Any other business
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