Difference between revisions of "Π polarizability Meeting Dec 15, 2021"

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(Minutes)
(Minutes)
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## Proposal (Sasha and Sergey)
 
## Proposal (Sasha and Sergey)
 
##* Firmware for TOF trigger not yet installed in Hall D.  
 
##* Firmware for TOF trigger not yet installed in Hall D.  
##* Sergey: Downloading, checking and testing for the first time can take time, and can possibly lead to unexpected problems. Best to use beam time for data taking.
+
##* Sergey: Downloading, checking and testing for the first time can take time, and can possibly lead to unexpected problems. Best to use beam time for data taking. Should have time with testing with playback before beam time is used.
 
##* Suggest to take raw data with random trigger and analyze later by emulating trigger. The raw waveforms in the data can be used effectively to study the trigger performance using the "playback" mode.
 
##* Suggest to take raw data with random trigger and analyze later by emulating trigger. The raw waveforms in the data can be used effectively to study the trigger performance using the "playback" mode.
 
##* Random trigger rate would be about 3 kHz.
 
##* Random trigger rate would be about 3 kHz.

Revision as of 12:08, 15 December 2021

Meeting Time And Location

09:30 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

Connecting

You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):

  1. Make sure you have created a BlueJeans account via your JLab CUE account using this link:

  2. Meeting ID: 949 429 419
    • (you may need to type this in, depending how you connect)

  3. If connecting via Web Browser: click this link (no passcode is needed):

  4. If connecting via iOS or Android App:
    • Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting

  5. If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"

  6. If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above



Action Items

  1. Generate MC samples of pi+pi- (Elton and Andrew)
  2. Organize trigger test meeting (Eugene) See discussion today
  3. Develop schedule for trigger test (Ilya) See discussion today
  4. Push branch changes to hdgeant4, halld_sim and hdds to master (Simon) Pushed halld_sim (merged), hdgeant4 (waiting for Richard), hdds will be pushed shortly.

Preliminary Agenda

  1. Previous CPP meeting: Dec 8, 2021
  2. Announcements
    • Current experimental run is extended till Monday Dec 20. SRC experiment replaced C target with LD2 yesterday.
    • Bluejeans being phased out between now and end of January. New system will be ZOOM.
  3. Action Items
  4. CPP-NPP trigger
  5. Software/Calibration for CPP (David, Alex and Sean)
  6. PID + AI
    • Data for AI (Andrew)
  7. CPP and NPP Readiness Review
  8. MWPC Testing
  9. CPP and NPP Experiment Configuration
  10. Electronic Configuration (Beni)
  11. hdgeant4 updates (Mark)
  12. Software consolidation (Simon)
  13. GlueX Data Analysis
  14. CPP Simulations
  15. Other business
  16. Next meeting

Minutes

Attending: Alex, Andrew, David H, David L, Ebode, Elton, Eugene, Ilya, Mark, Nikhil, Rory, Sasha, Sergey Simon

  1. Previous CPP meeting: Dec 8, 2021
  2. Announcements
    • Current experimental run is extended till Monday Dec 20. SRC experiment replaced C target with LD2 yesterday.
    • Bluejeans being phased out between now and end of January. New system will be ZOOM.
  3. Action Items
  4. CPP-NPP trigger
    1. Proposal (Sasha and Sergey)
      • Firmware for TOF trigger not yet installed in Hall D.
      • Sergey: Downloading, checking and testing for the first time can take time, and can possibly lead to unexpected problems. Best to use beam time for data taking. Should have time with testing with playback before beam time is used.
      • Suggest to take raw data with random trigger and analyze later by emulating trigger. The raw waveforms in the data can be used effectively to study the trigger performance using the "playback" mode.
      • Random trigger rate would be about 3 kHz.
      • Current target is 30 cm of LD2. Rad. len = 745 cm. Interaction length = 307 cm. -> Target is 4% rad.len. and 10% inter. lengths.
      • Note: CPP target is 5% rad. len. of Pb.
      • Ilya: Should take data at low beam currents expected for CPP
      • TOF Trigger files can be downloaded in Jan. Will need to keep detectors powered so that they can easily be brought back for testing
      • Ilya: What about adjusting the timing between the TOF (CPP) and calorimeter triggers (NPP)? Sasha: This takes several hours, but is a standard procedure that must be done at commissioning with the final firmware in place.
      • Eugene: With a TOF window of 80 samples (320 ns), a 2 hour data run (at 50% efficiency) provides about 3 s of live data.
      • Proposal is to take raw data with a random trigger at 140 nA (SRC nominal) and 50 nA (approx CPP intensity).
  5. Software/Calibration for CPP (David, Alex and Sean)
  6. PID + AI
    • Data for AI (Andrew)
  7. CPP and NPP Readiness Review
  8. MWPC Testing
  9. CPP and NPP Experiment Configuration
  10. Electronic Configuration (Beni)
  11. hdgeant4 updates (Mark)
  12. Software consolidation (Simon)
  13. GlueX Data Analysis
  14. CPP Simulations
  15. Other business
  16. Next meeting