Π polarizability Meeting Apr 6, 2022

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09:30 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

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Elton Smith is inviting you to a scheduled ZoomGov meeting.

Topic: CPP Weekly Meeting
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Action Items

  1. Check with Sasha on steps for analyzing the random triggers in raw mode to check firmware (replay)
  2. Work with Justin to create the appropriate translation tables for the scalers (Beni) Beni meet with Justin and coordinated the changes to the translation tables. The system is not very user friendly and Justin has been making all the changes. It also includes translation tables for the FMWPC.
  3. Obtain from accelerator best guess about the electron beam energy for CPP run (Elton) Edy Niessen confirmed that we should plan on 11.7 GeV for the electron beam energy this summer.

Preliminary Agenda

  1. Previous CPP meeting: Mar 30, 2022
  2. Previous CPP Software meeting: Π polarizability Software Meeting Mar 17, 2022
  3. Announcements
  4. Action Items
  5. CPP and NPP Run Conditions
  6. Photon beam / tagger / diamonds
  7. Software/Calibration
    • Simulations
  8. MWPC Testing
  9. CPP and NPP Experiment Configuration
  10. CPP-NPP trigger
  11. DAQ and Electronic Setup (Sergey and Beni)
  12. Other business
  13. Next meeting

Minutes

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

  1. Previous CPP meeting: Mar 30, 2022
  2. Previous CPP Software meeting: Π polarizability Software Meeting Mar 17, 2022
  3. Announcements
    • This will be Mark's last meeting. Thanks for all your contributions and Happy Retirement!
  4. Action Items
  5. CPP and NPP Run Conditions
    • We need to decide on what fraction of empty target data to take. Ilya: will need to take some data to help decision making. Rory: Develop a plan for deciding during our commissioning.
    • Igal: Empty target background in PRIMEX is largely coming from the beamline downstream of the target.
  6. Photon beam / tagger / diamonds
  7. Software/Calibration
    • Nikhil: David has generated new data sets including background. Software meeting is in a couple of weeks.
    • Simulations
  8. MWPC Testing
    • FMWPC Log Book
    • halldweb/talks/CPP_NPP
    • Beni: Not yet received the batch of signal cables, expected last Friday. [Note Added 4/7: first 6 cables have been received]
    • Rory: Asked about the problem with LV. Beni: Difficulty has due to software not ramping + and - voltages at the same time. Fixed by Hovanes by adding a single button on the EPICS GUI.
    • Beni: MPWC HV is hooked up to the standard system.
  9. CPP and NPP Experiment Configuration
  10. CPP-NPP trigger
  11. DAQ and Electronic Setup (Sergey and Beni)
    • Serguei: Need to install fibers for trigger connections. Firmware in the CAEN TDCs has been updated and Serguei has installed it in the TDCs used for the CTOF
    • Beni: NIM crate needs to be installed so that the scintillators can be cabled up as a trigger. Most modules for the NIM trigger are in hand.
  12. Other business
    • Andrew: Investigating kaon background in the pi+pi- data sets. Main selection is using the Chi2 threshold. Can play with the threshold but may need other handles to discriminate against kaons. Rory: Can also investigate cuts on TOF, especially for low energy kaon. Final extraction of pi+pi- signal may be using Amplitude analysis where the kaon signal would likely show up in different moments.
    • Rory: Andrew will turn around his BH e+e- analysis, which depends on the proton FF, and investigate its sensitivity to the proton charged radius.
  13. Next meeting