WAC Notes July 25 2019

Documentation

HOW TOs for shift crew

Expert Tools

All Expert Contacts

PREX Main << Weekly Analysis Coordinator << WAC Notes << Instructions

WAC Notes July 24 2019 << >> WAC Notes July 26 2019

July 25 2019

Production Run List

Start Slug 13, IHWP OUT Flip Right, FFB on always

• • • Since we are using bcm_dg_ds, the width in the bcm is ~1.5X of what we used to have with bcm_an_ds3
• Good - run3622
• Good - run3623
• Good - run3624
• Good - run3625
  • Mini-run 0 had too large detector widths->Fixed after bad_event_cut
• Good - run3626
• Good - run3629
  • Aq mean was large for first two miniruns
  • bad_evt_cut applied, now good
• Good - run3630ADDED from suspicious list
  • Detector widths are fluctuating between mini-runs.
  • First run with detector width started increasing
  • Applied bad_evt_cut, now good
• Good - run3631ADDED from suspicious list
  • Detector widths become worse
  • Beam position change
  • Beam current fluctuating
  • Normalized detector yield is decreasing over time
• Good - run3632ADDED from suspicious list
  • Regressed detector widths are even higher
  • Normalized detector yield is decreasing over time
  • Regressed detectors are correlated
• Good - run3633ADDED from suspicious list
  • Normalized detector yield is increasing over time (opposite to run3632)
  • Regressed detectors are correlated
  • Regressed detector widths are larger
• Good - run3634ADDED from suspicious list
  • Normalized detector yield is increasing over time (opposite to run3632)
  • Regressed detectors are correlated
  • Regressed detector widths are larger
• Good - run3635ADDED from suspicious list
  • Normalized detector yield is increasing over time (opposite to run3632)
  • Regressed detectors are correlated
  • Regressed detector widths are larger
• Good - run3636ADDED from suspicious list
  • Long beam trip during the run
  • Normalized detector yield is decreasing again
  • Regressed detector widths are larger
• Good - run3640ADDED from suspicious list
  • This run was taken during collimator scan
  • Aq widths are too large
• Good - run3641ADDED from suspicious list
  • Aq widths are too large (>200ppm)
  • Started with 1uA checking position then go to 70uA

Non-Production Runs and Bad Runs

• Test - run3628

Issues

• There were many pedestal and event cut problems. From now on, when an event cut isn't absolutely necessary it should be removed - see japan source code for reference of cuts here
• The BCM appears to be falling apart. We are fixing it and running slug 12 on BCM DG DS in the meantime.
• BPM 4ec had intermittant problems (iocse10 has issues) and so we are regressing with 4e again. BPM 11X is ok and stays in regression.

• Increase in Detector widths and Collimator temperature HALOG COLLIMATOR HALOG
• Increase in collimator temperature and raising neutron dose HALOG
• The increase in detector widths started from late Swing Shift HALOG
• Cavity BPM lock change HALOG

Other Status Updates

• Accumulated charge =
• Instructions for changing analysis/launcher for online panguin root file location
• Decided to normalize slug 12 against the BCM DG DS instead of AN