20210401-PREX2-Analysis

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Logistic information

 Time: Thursday, 1PM
 Meeting room at JLab:  REMOTE ONLY
 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 International toll number:         408-740-7256
 Bluejeans CODE: 402 129 576
 Bluejeans link: https://bluejeans.com/402129576

Agenda

  1. Cameron: CREX Pedestal update and cross checked new maps
  2. Cameron: update on respin-2 - finished setting up
    • Changed from 1357 "Good" production runs to 1392 (35 net newly deemed Good runs) and updated labels in RCDB
    • Updated cuts on ~40 individual runs and the final week of cuts too, to accomplish that
    • Improved burp cut implementation
    • Changed PMT pedestals to using beam off
    • Updated BPM and BCM pedestals with most up to date bcm_an_us vs. unser reference (log)
    • Added respin1-based BMOD slopes and stable eigenvector inputs for subsequent eigenvector based regression
    • Added some more AT vs. main detector combos for additional AT analyses
    • Test case, compare runs 6330, 6331, 6332 between respin 1 and 2 to eachother:
      • No change in number of events in root files
      • ~400 new entries pass cuts in respin2
      • Change in Aq mean ~0.04 ppb for the same set of data
      • But 63 ppb change due to additional entries included (this was a no-Aq feedback time period, mean Aq is 1812 ppb -> 1749 ppb)
      • 0.2 ppm shifts in regressed mean for these 3 runs (out of ~2ppm signal ~ few percent shift - needs to be followed up on with the full datasets)

Present

Excused