WAC Notes July 18 2019

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Revision as of 19:10, 18 July 2019 by Cameronc (Talk | contribs) (Slug 7: 50 uA Production)

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PREX Main << Weekly Analysis Coordinator << Instructions

WAC Notes July 17 2019 << >> WAC Notes July 19 2019

July 18 2019 all 3 Shifts

Slug 5: 70 uA production

Data was recovered from 3424, 3429, and 3430 current ramp runs with better beam current lower limit cut

  • Good: 3424
  • Good: 3425
  • Good: 3426
  • Good: 3427
  • Good: 3427
  • Good: 3428
  • Good: 3429
  • Good: 3430

Slug 6: 50 uA Production

Lots of production, only 1 major problem (lost run 3533 with 9k muls due to blinder fail from EPICs fastlogger and Compton IOC)

Run list:

  • Good: 3434
  • Good: 3435
  • Good: 3436
  • Good: 3437
  • Good: 3438
  • Good: 3439
  • Good: 3440
  • Good: 3441
  • Good: 3442
  • Good: 3443

Slug 7: 50 uA Production

  • Good: 3444
  • Good: 3445
  • Good: 3446 - double difference in BCM returns with vengence
  • Good: 3447
  •  ???: 3449
  • Suspiciously large asyms in main dets: 3450
  •  ???: 3451
  •  ???: 3452
  •  ???: 3453
  • Good: 3454
  • Good: 3455 - RQ2 tripped off

Production Run List (status at Midnight, end of 7/18/2019)

Non-Production Runs and Bad Runs

  • Died (blinder needs fixing): 3433

Pedestal/Calibrations Updates

In order to salvage current ramps and trips on large chunks of data and save time/save the regression/pedestal usefulness:

  • Change the lower limit current cut to be nominal-15 uA (35 for 50 uA, 55 for 70 uA)
  • Updating the event cuts to have nominal-15 uA beam current lower cut Starting at run 3456 (now) and also setting specifically for 3 70 uA current ramp runs 3424, 3429, 3430 (suspect Aq, but worth a try)
    • 50 uA: prexCH_beamline_eventcuts.2948-.map -> prexCH_beamline_eventcuts.3456-.map (pending beam...)
      • 3451:
      • 3452:
      • 3453: Fixed
    • 70 uA: prexCH_beamline_eventcuts.2948-.map -> prexCH_beamline_eventcuts.[3424,3429,3430].map
    • Follow up - cut on current at nominal - 15 uA -> applied to current ramp runs
      • 3424: Cuts out half the prior data... marginal improvements
      • 3429: No effect on anything (since the beam was always at 60-70 anyway)
      • 3430: Cuts out 2/3rds of the prior passing data - fixes regression!

Issues

Other Status Updates

PQB runs need analyzing - see notes