Difference between revisions of "WAC Notes July 18 2019"

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(Slug 6: 50 uA Production)
(Slug 5: 70 uA production)
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== July 18 2019 all 3 Shifts ==
 
== July 18 2019 all 3 Shifts ==
=== Slug 5: 70 uA production ===
+
=== Slug 5: 70 uA production - Test Swing Shift ===
 
Data was recovered from 3424, 3429, and 3430 current ramp runs with better beam current lower limit cut
 
Data was recovered from 3424, 3429, and 3430 current ramp runs with better beam current lower limit cut
 
* Good: [https://hallaweb.jlab.org/parity/prex/onlinePlots/summary/2019-07-17/run3424_000/run3424_000_all.pdf 3424]
 
* Good: [https://hallaweb.jlab.org/parity/prex/onlinePlots/summary/2019-07-17/run3424_000/run3424_000_all.pdf 3424]

Revision as of 09:10, 19 July 2019

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

July 18 2019 all 3 Shifts

Slug 5: 70 uA production - Test Swing Shift

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

Slug 6: 50 uA Production - Stable Owl Shift

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

Slug 7: 50 uA Production - During PQB Beam Studies

  • Good: 3444
  • Good: 3445
  • Good: 3446 - double difference in BCM returns with vengence
  • Good: 3447
  • BPMs moving, needs cuts: 3450
  • BPMs moving, needs cuts: 3451
  • BPMs moving, needs cuts: 3452

Slug 8: 50 uA Production

Caryn changed the IHWP state to IN

  • Good: 3453
  • Good: 3454
  • Good: 3455 - RQ2 tripped off
  • Next: access, and PQB to follow at low current, then Moller, then DAQ, then another access for magnets

End of slug 7 -> Removed S0 -> should have a tiny ~1% effect on widths now

Non-Production Runs and Bad Runs

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: BCM cut fixed, but PQB efforts messed with BPMs too much
      • 3452: BCM cut fixed, but PQB efforts messed with BPMs too much
      • 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!
  • Caryn updated the Main Det and SAM pedestals from the current scans, for 50 uA and 70 uA data:
    • Here, noted Here
    • New Pedestal Map for 70 uA 3424-3430 => prex_sam_pedestal.3424-3430.map, prex_maindet_pedestal.3424-3430.map
    • New Pedestal Map for 50 uA 3456- => prex_sam_pedestal.3456-.map, prex_maindet_pedestal.3456-.map
    • Also changed retroactively from 3398- the prex_sam_pedestal.3398-.map to match prex_sam_pedestal.3456-.map 50 uA pedestals

Issues

  • Needed nominal - 15 uA BCM lower limit cut.
  • Need BPM stability/burp/holdoff kind of cut to save some strange noise in 3403, 3404, and some PQB runs this afternoon.
  • It looks like there is non-symmetry between arms (before RQ2 failed)

Other Status Updates

  • PQB runs in the afternoon need more in depth (BPM cut) analyzing - see notes
  • S0 Removed - midway through slug 8... but at least we know when (run 3456 is the production run it happens after)