[Halla_running] [Revised Logentry] RC summary Hall A July 23 2025

[pentchev at jlab.org]

Logentry Text:
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Dear Collaborators,

The new estimate for the accumulated charge up to now is 62.86 C (recalculating past two weeks).

Yesterday we finished the GEM HV scan and continued running with the previous HVs (layer 4 & 5 25V lower, the rest nominal) during swing and owl shifts. 
Starting DAQ was sometimes a problem  https://logbooks.jlab.org/entry/4424463.
MCC reported steady increase of the Oxygen in the Hall A beam dump (up to 4%), they will be working on this today. 
Right now we are in controlled access, plan to lock the Hall at 2pm.

Important issues/events to your attention:
- started correcting the accumulated charge by the DAQ live time (Mark modified the script)
- GEM HV optimization 
- Approval for Isobutane usage? 



Experiment progress:
-Charge collected during the last ~24 hour period:  1.21 C (L4 & 5 25V lower)
-Total accumulated charge at Kin3 so far: 62.86 C (Goal 100 C)
-Total accumulated charge at Kin3 since July 16 : 4.91 C
-Average running efficiency since July 16 Day shift (ABU tot)/(AU tot + BANU tot): 83% 

Shift summaries:
07/22/2025 DAY:https://logbooks.jlab.org/entry/4424099
07/22/2025 SWING:https://logbooks.jlab.org/entry/4424394
07/23/2025 OWL:https://logbooks.jlab.org/entry/4424640

BTAs:
07/22/2025 DAY:  https://logbooks.jlab.org/entry/4424404
07/23/2025 SWING: https://logbooks.jlab.org/entry/4424646
07/23/2025 OWL:https://logbooks.jlab.org/entry/4424895 

We will have a short RC meeting today at 1 pm in the conference room in 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

Hall A RC
Lubomir Pentchev

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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/4424965
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