[Halla_running] [Revised Logentry] RC Daily Summary 05/09/25

[asar at jlab.org]

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

MCC could deliver ~19.7h of beam to hall and we could take data for 15.88h which accounts for 81% of up time. 

We have been running very smooth and efficiently until 05:30AM when GEM gas alarm went ON for Argon manifold pressure(https://logbooks.jlab.org/entry/4414463). The safety feature activated for second alarm which automatically turned OFF the GEMs. GEM experts could find the issue and recovered(https://logbooks.jlab.org/entry/4414497). At 6:45 another alarm in CO2 manifold pressure activated due to failure of switchover system. However this time GEM experts realize the issue with switchover system, they could fix it but will further investigate. Please find more detailed information here (https://logbooks.jlab.org/entry/4414566).

GEMs have been kept turned OFF after the gas system issue started. Gas mixture is returned to desired value(last checked at 09:40).

Hall was surveyed(08:40) and it is accessible maintenance. Current work going on are, installation of power strip for network switch, copper shielding installation, SiPMT tests.


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- Total Accumulated Charge at Kin3 so far: 49.47 C (Goal: 100 C)
- Total Accumulated Charge at Kin3 since Jul 02 Day till Jul 09 08:00 : 7.064 C
- Estimated charge acquisition efficiency since Jul 02 Swing till Jul 09 08:00: 89.7%(7.0.64/7.873): number seems mysterious, We are investigating. 

Run plan:
- Production on LH2 at 20 uA;

Current issues/plan:
- 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
- Moller measurement on Thursday.
- Low beam, zero filed data on single foil and multi-foil Friday/Monday

Shift summaries:
08-Jul-2025 D https://logbooks.jlab.org/entry/4413882
08-Jul-2025 S https://logbooks.jlab.org/entry/4413518
09-Jul-2025 O https://logbooks.jlab.org/entry/4413700

Shift BTA:
08-Jul-2025 D https://logbooks.jlab.org/entry/4414257
08-Jul-2025 S https://logbooks.jlab.org/entry/4414333
09-Jul-2025 O https://logbooks.jlab.org/entry/4414562

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/4414631
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