Π polarizability Meeting Apr 12, 2023

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11:00 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

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Action Items

Preliminary Agenda

  1. Previous CPP meeting: Apr 5, 2023
  2. Announcements
  3. Action Items
  4. Calibrations
    • TOF: expand calibration to more runs
    • FCAL: ongoing, needs another "month?", currently good to 5% for pi0 width. issues with the innermost ring, no pi0 seen
    • BCAL: was waiting for CDC to be calibrated, did not know it was done. Will proceed on this now.
    • CDC: calibration is done. Naomi is working on refinements that do not impact the BCAL efforts. Note that the usual procedure to calibrate the CDC does not work because the Start Counter was not installed. Sean made a procedure to use the BCAL timing instead, however, this may introduce a catch 22?
    • FDC: Keigo, done.
    • CTOF, FMWPC:
      • Digihit integral vs peak 2-d plots for groups of 24 MWPC channels show noise dependence on hit multiplicity in the group.
        plots made for the entire group, file name legend: 1st number - MWPC#, 2nd - 24 wires group #, 3rd - one for 1...2 hits in the group, five for 10 or more hits]
    • Tagger-Mic, -Hod, PS, TPOL: ?
      • ver10: hodoscope and microscope look ok. There are issues with the relative timing between PS and the tagger MIC and HOD they are constantly off by 4ns. The energy calibration for a group of microscope columns is off.
    • Accidental Scaling Factor calibration requires Tagger and PS calibration.
  5. CCDB Constants Status (Elton)
  6. Data Analysis
  7. Wiki Page Analysis_Overview
  8. Documentation
  9. Upcoming Presentations
  10. Other business
  11. Next meeting

Minutes

Attending:

Docs/Files

in: /u/group/halld/www/halldweb/html/talks/2023/CPP/ link: This directory is accessible from the web at https://halldweb.jlab.org/talks/2023/CPP

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