RC meeting and Run Plan, Monday December 12th

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Revision as of 13:14, 12 December 2022 by Ericking (Talk | contribs) (→‎Data Collection Status)

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RC Meeting Information

Current RC: Eric King [ericking (@jlab.org or @temple.edu)]
Time: Daily at 3:30PM
Location: Counting House Conference Room

Remote Connection Details

Shift Schedule

Link to Schedule

Until Shutdown

All shifts are full! :)

Accelerator Status

  • Accelerator was down at the end of SWING for 45 minutes. [DT Event ID: 17472]
  • Hall C valve/vacuum repair is complete; they're coming back online Tuesday; they will be priority hall next week.

Current Status

Taking production data on 3-He

Shift Summaries

Things That Happened

  • HH Hodoscope voltages dropped on Sunday OWL (IDK, if this is wholly unusual). 4099867
  • Scalar helicity histogram from run 3191 50K Replay showed all zeros. 4099876
    • This was about 30 minutes of lost data.
    • I only found one HALOG post while talking to SL, advised SL to start new run when accelerator returned beam and verify helicity data correct.
    • SL should make reviewing 50K plots high priority.

Beam Current

We've been happily running at 40uA.

  • (Saturday) I asked Sebastian to make a record of the ramp rates over the course of the past 8 hours during Saturday SWING and he went an extra step. 4099752
  • (Sunday) Bill has taken this further and created a strip chart that tracks this continually that seems to work very nicely. 4099956
    • Perhaps ask the Shift Leader to screenshot once per shift or add it to Target operator plots to be posted during shift.

Target

Target polarization has been stable. List of the recent polarizations

Target Operator issues:

  • (Monday) UVa fiber trip... no alarm??? 4100334
  • (Sunday) Bill noticed that the wrong laser software was running on polhe1; he corrected the issue. 4100010
  • Junhao has complained that the Windows target VNC screen keeps locking, this is a nuisance. 4100065

Issues Resolved

  • Bill Henry has resolved the communication issue regarding the Moller HH magnet. Thank you, Bill. 4099942
  • Bill spoke with Zeke about GEM RED alarm panel items about this and they agreed to bring the topic up in Monday's RC Meeting.

Issues remaining

  • BB GEM APV unreachable and cannot be repaired at this time.

Short Term Run Plan

  • Continue production run on He3 target, 40 uA
  • Use GEnII-noSBSGEMs DAQ config
  • Use ps3=0, ps5=6, others =-1
  • BBCal threshold at -366 mV, HCal threshold at -19 mV
  • NMR measurement every 3 - 4 hours, close to 4 hours is better

Planned Accesses to the Hall

None

Special Requests

Please email me ericking (@jlab.org or @temple.edu) if there's something to be added.

Notices in Effect for Shift Crew

  • Power down SBS, BB, and Detector HV before making an access to the Hall

Data Collection Status

Collected 8.994 C of charge over the weekend (33.553 prior to RC Meet on Friday)

  • 77 out of 141 days (~54.6%)
  • Total uncorrected accumulated charge on He3: 56.014 C out of 232C (24.14%)
    • 2-Pass: 13.467 C
    • 3-Pass: 42.547 C (Monday at NOON)
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