[Halla_running] [New Logentry] RC Daily Summary 07/03/2025

[asar at jlab.org]

Logentry Text:
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Key updates for the past 24h (Wed Day+Swing and Thu Owl):
We had maintenance day yesterday where several works has been done on machine along with beam study which lasted 20:30PM. Flow meter calibration on multiple RF zones (cryo heater & JT adjustments) triggered target alarm in the hall. Expert on call (Silviu) was informed by TO(Jacob McMurtery). Some JT valve adjustments have been done to keep target stable.

Kip and Jhing went into the hall to fix HV issue for crate 38 slot 8. Simple power cycling the crate bring back the card. Mark McMullen replaced a bad cRIO expansion chassis used to monitor the temperature of the light guides and cooling pressure. We finished all the scheduled job in the hall and Techs unlocked the magnets at 16:30 and we went into power permit at 16:45. 

MCC could send 5uA tune beam at 20:40 with target in Home position and Raster OFF. Two iteration of Harp scans taken for acceptable beam width (<500) https://logbooks.jlab.org/entry/4410436. Beam position measurements were done at X=-1.2V and Y=1.0V on cross target which found to be slightly left shifted (https://logbooks.jlab.org/entry/4410461). Jiwan was informed about the position and we decided to move in left on X by using H04A/E =-1.6V and carried out position measurement with 4mm X 4mm raster (https://logbooks.jlab.org/entry/4410527) which looked acceptable to move on for production.

We started production data taking at 20uA. The Owl shift was relatively hard towards DAQ issues. There is no beam since 07:08, however MCC reported in the meeting about issue with PSS on injector side which need physical intervention and maintenance work begin at 9:00 for 4 hours.
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- Total Accumulated Charge at Kin3 so far: 42.00 C (Goal: 100 C)
- Total Accumulated Charge at Kin3 since Jul 02 noon: 0.34 C
- Estimated charge acquisition efficiency since Jul 02 noon: 79%(0.34/0.43)

Run plan:
- Production on LH2 at 20 uA;
- Spot change postponed to Wed/9; evaluate polarization measurement before that

Current issues:
- a ROC may crash during the run and/or DAQ requires multiple resets before start new run
- Monitor scalers and replay for missing/bad data that may require DAQ components reset/reboot/run restart
- Offline analysis: working on tracking reconstruction and processing time improvement

Shift summaries:
02-Jul-2025 D https://logbooks.jlab.org/entry/4410174
02-Jul-2025 S https://logbooks.jlab.org/entry/4410325
03-Jul-2025 O https://logbooks.jlab.org/entry/4410625

Shift BTA:
02-Jul-2025 D https://logbooks.jlab.org/entry/4410329
02-Jul-2025 S https://logbooks.jlab.org/entry/4410613
03-Jul-2025 O https://logbooks.jlab.org/entry/4410838

We will have our daily (Mon to Fri) RC meeting at 1PM in the conference room on the second floor of the CH and on zoom
Zoom info:
Join ZoomGov Meeting
https://jlab-org.zoomgov.com/j/1616220064
Meeting ID: 161 622 0064
Passcode: 314159


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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4410904
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