Π polarizability Meeting Feb 2, 2022

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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. Review CPP test run for rates (Ilya) and check with Sasha on steps for "replay"
  2. Richard will present a plan for simulating the enhancement and polarization for a given electron beam on a given area of JD103. Presented at the beamline meeting
  3. Options for front-panel trigger based on CPP Scintillators (Beni) Elton presented a scheme and Beni has looked into hardware.

Preliminary Agenda

  1. Previous CPP meeting: Jan 26, 2022
  2. Announcements
    • Paper submitted to arXiv "Photoproduction of pion pairs at high energy and small angles"
    • Letter from the director: "...our colleague and friend, Javier Gomez, passed away tragically on Saturday, Jan. 29."
  3. Action Items
  4. Software/Calibration for CPP (David, Alex and Sean)
  5. Plan for diamond simulations (Richard)
  6. PID + AI
    • Data for AI (Andrew)
  7. MWPC Testing
  8. CPP and NPP Experiment Configuration
  9. CPP-NPP trigger
  10. DAQ and Electronic Setup (Sergey and Beni)
  11. Software consolidation (Mark and Simon)
  12. CPP Simulations
  13. Other business
  14. Next meeting

Minutes

Attending: Albert, David L., Rory. Alex, Andrew, Beni, David H., Ilya, Mark, Sergey, Elton, Simon

  1. Previous CPP meeting: Jan 26, 2022
  2. Announcements
    • Paper submitted to arXiv "Photoproduction of pion pairs at high energy and small angles"
    • Letter from the director: "...our colleague and friend, Javier Gomez, passed away tragically on Saturday, Jan. 29."
  3. Action Items
  4. Software/Calibration for CPP (David, Alex and Sean)
    • DFMWPCMatchedTrack
    • Quite a few updates: Simon has updated software projecting tracks to various detectors including Fcal, Fmwpc and new scintillators.
    • Studying how to include MWPC hits into PID algorithms.
    • David is updating the event viewer to hdview2 for a new window for the MWPC.
    • Simon: working on hdgeant4 to emulate the deposited charge, which is presently missing (q instead of dE)
    • Mark: The CPP branch has been merged into the master and we will keep a parallel track but attempting to keep the branch from diverging from the master.
    • David has started series of dedicated CPP software meetings, which will meet weekly on Thursdays at 12:30-1:30 pm.
  5. Plan for diamond simulations (Richard)
  6. PID + AI
    • Data for AI (Andrew)
    • Working on implementing e+e- PID network into a factory. Need to use the measured momenta instead of kinematically fit values (since a reaction hypothesis may not available at the time PID is performed).
  7. MWPC Testing
    • Move to Hall D
    • FMWPC Log Book
    • Elton: Arwen was retested with a banana plug on the ground of the LV cable. Noise levels of the order of 400 counts are still visible.
    • All MWPCs have been moved to the hall. We will need to reinvestigate the noise levels in situ.
    • Elton and Ilya will setup the gas purging (4 hours) and HV on each chamber (1000 V) to check for any broken wires during the move.
    • There was quite a bit of discussion about how to handle the noise on the chambers. David: One option might be to readout the MWPCs in raw mode (as we did for TPOL) if the rate is sufficiently low.
  8. FADC125 format
  9. CPP and NPP Experiment Configuration
  10. CPP-NPP trigger
  11. DAQ and Electronic Setup (Sergey and Beni)
    • Beni is trying to organize access to the DAQ this spring. Elton: need to make sure that there is the time for MWPCs testing.
    • Sergey is setting up the the DAQ for MWPCs that can be moved to the integrated Hall D DAQ system.
  12. Software consolidation (Mark and Simon)
  13. CPP Simulations
  14. Other business
    • Mark announced that he will be retiring in April.
  15. Next meeting