[Halla_running] [Revised Logentry] RC Daily Summary 07/07/25

[asar at jlab.org]

Logentry Text:
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Key updates for the past 24h (Sun Day+Swing and Mon Owl): 

Last 24h has been a little troubling from both accelerator and hall A side. Beam was down for 5.4 h  due to issue with verticle separator (https://ace.jlab.org/dtm/all-events?qualified=true&incidentId=15198), HV issues on 1L10, 1L05, 2L12 and QE measurements. Hall A subsystems were pretty stable over the long weekend untill various issues arose after QE (06:00) study done by MCC. MCC restored the beam to hall A at 06:27 and after that most of the subsytem were unstable specifically GEM and ECal towards HV crate. We requested for an escorted access for hard reboot the GEM HV crate and network switch which bring them up(https://logbooks.jlab.org/entry/4413298). We also find the issue with GEM gas reading, it was also resolved after resetting the crate in gas shed (https://logbooks.jlab.org/entry/4413294).

With all those issues and down time we could take data with 80%(12.5/15.6) up time.

Later we lost many crates(disconnected). DAQ Experts figure out the issue with network switch which required another escorted access to fix the issue. Power cycling the switch resolved the issue. They also noticed 2 GEM VXs crates were turned off, they were also brought up (https://logbooks.jlab.org/entry/4413361). ECal group took this opportunity to powercyle HV crate 32 slot 1 which bring this crate online too(https://logbooks.jlab.org/entry/4413360).

HCal group has updated some threshold on 10 blocks(https://logbooks.jlab.org/entry/4413404) which is effective from run number 5154.

After all these troubles and fixes we are taking production data smoothely.

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- Total Accumulated Charge at Kin3 so far: 46.69 C (Goal: 100 C)
- Total Accumulated Charge at Kin3 since Jul 02 Swing till Jul 07 00:00 : 4.73 C
- Estimated charge acquisition efficiency since Jul 02 Swing till Jul 07 00:00: 95%(4.73/4.98)

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

Current issues:
- Installation of Copper plate
- 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:
06-Jul-2025 D https://logbooks.jlab.org/entry/4412650
06-Jul-2025 S https://logbooks.jlab.org/entry/4412821
07-Jul-2025 O https://logbooks.jlab.org/entry/4413051

Shift BTA:
06-Jul-2025 D https://logbooks.jlab.org/entry/4412810
06-Jul-2025 S https://logbooks.jlab.org/entry/4413046
07-Jul-2025 O https://logbooks.jlab.org/entry/4413272

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/4413411
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