Π polarizability Meeting Oct 20, 2021

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Meeting Time And Location

09:30 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

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Action Items

  1. Follow up on procurement for electronic enclosures. Elton has responded to procurement for approval.
  2. Develop a plan for beam TOF trigger tests

Experiment Updates

  1. Previous CPP meeting: Oct 13, 2021
  2. Announcements
  3. Action Items
  4. MWPC Testing
  5. Discussion of TOF trigger tests with beam
  6. GlueX Data Analysis
  7. CPP Simulations
  8. Other business
  9. Next meeting

Preliminary Agenda for CPP Software Meeting

  1. Previous CPP meeting: Oct 13, 2021
  2. Announcements
  3. Overview / refresher (Elton)
  4. Electronics/DAQ modifications (Discussion)
  5. Configuration changes
    1. Target (Pb upstream)
    2. Trigger (TOF + calorimeter)
    3. New Detector (MWPCs)
    4. Microscope move (Coherent peak at 6 GeV)
  6. Software
    1. Simulation (hdgeant4)
    2. Trigger simulation / monitoring
    3. Single block "showers" in FCAL
    4. Tracking (upstream vertex + FMWPCs)
    5. Calibrations
      • charged particle vertex reconstruction
      • RF bunch identification at the CPP target
      • Track/hit matching
      • CCDB entries for the reconfigured tagger
    6. PID and AI
  7. Other business
  8. Next meeting

Minutes

Attending: Albert, Alex, Andrew, Beni, David H., David L. Greg, Ebode, Ilya, Mark, Nikhil, Rory, Sean

Experiment Updates

  1. Previous CPP meeting: Oct 13, 2021
  2. Announcements
    • PRIMEX completes data taking in two weeks.
  3. Action Items
    • Elton has sent approval for payment of electronic enclosures to procurement.
  4. MWPC Testing
    • FMWPC Log Book
    • Arwen
      • Scintillators misbehaving in this data set. Perhaps miscabling? MWPC looks good.
    • Bilbo
    • Celeborn
    • Rory: May consider mounting scintillators perpendicular to wire planes in the actual experiment. Will discuss this with Tim at design meeting.
  5. Discussion of TOF trigger tests with beam
    • Ilya: need to take data with random trigger and also with the TOF trigger. No specific advantages of taking during PRIMEX or SRC experiment.
    • We will develop ideas offline and get some feedback from Sasha about options.
  6. GlueX Data Analysis
  7. CPP Simulations
  8. Other business
  9. Next meeting

CPP Software Meeting

  1. Previous CPP meeting: Oct 13, 2021
  2. Announcements
  3. Overview / refresher (Elton)
  4. Electronics/DAQ modifications (Discussion)
  5. Configuration changes
    1. Target (Pb upstream)
    2. Trigger (TOF + calorimeter)
    3. New Detector (MWPCs)
      • Need to add efficiency scintillators both to the hdgeant4 model as well as find a home in the electronics.
    4. Microscope move (Coherent peak at 6 GeV)
    5. Beni: Need to think about how the reduced rate in the PS will affect the flux determination. The B-field in the PS must be adjusted to cover the coherent peak.
  6. Data Objects (David)
    1. Translation table from electronic crate into physical ids. Sean "volunteered" to do this.
    2. Calibrated hits. Take raw hits and covert to (time, amplitude, pulse integral, position). Alex was "volunteered" to do this.
      • There was some discussion about which format (CDC vs FDC) would be used. We are currently using the CDC format in the test data, which provides integral and peak, This is likely our best choice.
    3. Clusterizers
      • Simon: Presently matching tracks is done by creating lists of associated information with DChargedTrack objects. This does not require additional objects and is consistent with other detectors.
  7. Software
    1. Simulation (hdgeant4)
    2. Trigger simulation / monitoring
    3. Single block "showers" in FCAL
    4. Tracking (upstream vertex + FMWPCs) (Simon)
      • Extrapolation of tracks to the FMWPCs is working and in the master
      • Separate git branch contains matching of tracks to single-hits in FCAL. Elton: Do the single hits include pairs that do not form showers? Simon: Loop is over all hits not in showers, so probably it does, but will check.
      • New list of track matches to single FCAL hits created into REST format. Sean: Should review this decision to separate lists of matching hits to a) showers and b) single-hits, because (b) may be generally useful to other programs.
    5. Calibrations
      • charged particle vertex reconstruction
      • RF bunch identification at the CPP target
      • Track/hit matching
      • CCDB entries for the reconfigured tagger
    6. PID and AI
  8. Other business
  9. Next meeting