20191021-PREX2-Analysis

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Logistic information

Meeting room at JLab: CC F226

 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
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This meeting immediately preceeds the JAPAN meeting, and uses the same room and BlueJeans reservations.

Agenda

• Goals for this meeting
  • This will be taking over for the PREX2 WAC meeting, and this is intended to be a much more focussed discussion than
• PREX-2 runlist spreadsheet: [1]
• Status check on various analyses. (Many of these topics are not started yet, but have been or will be discussed soon)
  • Tao : additional combined plots looking at statistical self-consistency
    • Started to set up some macros; he is beginning to add elements to query the RCDB to get the run list, spectrometer arm status, etc.
    • Tao is partially waiting on finishing the updates to the RCDB
    • Cameron says that there is a script to help cross-checking that we have marked the single-arm runs.
    • Cip and Sangwa also think that the single-arm running was flagged pretty well during the run.
    • Kent makes the point that we need to have some way to document when plots are made, and what the dataset definition was for those plots.
    • Do we have plots of the multiplet plots all chained together at the slug level? Looking at how gaussian the distribution is, etc...
      • We think have so far just looked at run-level distributions
  • Weibin and Tao: table of cuts.
    • They have started to make a summary table of the cuts
    • Maybe create multiplet plots with all the runs in a slug chained together. Weibin will look at modifying the run-level plotting tool to make the slug-level plots.
  • Robert: pedestals
    • He's started looking at extracting the pedestal histories
    • He should make sure to include the single-arm markers for which runs to look at in the spectrometer pedestals
    • One of the things to look at is when we have "big" changes that we understand what the conditions were on either side of the change
    • Devi says there were only a few times at which we changed the HV
  • Victoria: beam modulation (raw data quality, residuals)
  • Devi: blinded tubes
    • He is working on getting new beam-off pedestals for the blinded tubes
  • (Cameron?): analog BCM consistency during periods of oscillation
    • A question is: is the mean of the BCM asymmetries during the periods of extra noise in the BCMs consistent with the other BCMs?
  • Overloaded regression (Tao?)
    • If you do regression with lots of extra variables, how does the corrected width behave?
    • What are sources of noise in the regression analysis?
    • Tao has some tools ready for this, buyt maybe will pass it to someone else. Kent and I will discuss how to incorporate this in the respin.
  • Need help with pair plots, stripline and cavity and complementary bpm resolution and performance.
  • Other topics please add to list!

Present

Tao, Devi, Don, Ryan

Phone: Cip, Sangwa, Cameron, Caryn, Jinlong, Kent, Robert R., Sakib