[Halla_running] [New Logentry] RC summary Hall A July 21 2025

[pentchev at jlab.org]

Logentry Text:
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Dear Collaborators,

During the last 24 hours the beam was stable up until 9:30 this morning due to an RF issue in one NL zone; opportunistically they are working on fixing other cavities in the NL. The DAQ live time was high during some periods especially in the mornings, but most of the time was varying with a mean of about 70%.  I propose and will discuss at today's meeting to keep the runs going up to 8 hours if the DAQ live time is high. This morning the Hall B solenoid quenched resulting in some fluctuations in our target that were mitigated by adjusting the JT valve.

Important issues/events to your attention:
- DAQ live time varying from run to run 
- Multiple problems when starting DAQ - see https://logbooks.jlab.org/entry/4422889, lately HCAL crates had to be power cycled 
- back_xy_L13M1 HVs tripped several times -  https://logbooks.jlab.org/entry/4422941
- ECAL crate lost communications twice - https://logbooks.jlab.org/entry/4422988

Experiment progress:
-Charge collected during the last ~24 hour period: 1.40 C (no GEM HV corrections)
-Total accumulated charge at Kin3 so far: 63.38 C (Goal 100 C)
-Total accumulated charge at Kin3 since July 16 : 6.01 C
-Average running efficiency since July 16 Day shift went up to (ABU tot)/(AU tot + BANU tot): 81% 

Shift summaries:
07/20/2025 DAY:https://logbooks.jlab.org/entry/4422490
07/20/2025 SWING:https://logbooks.jlab.org/entry/4422862
07/21/2025 OWL:https://logbooks.jlab.org/entry/4422995

BTAs:
07/20/2025 DAY:  https://logbooks.jlab.org/entry/4422748
07/20/2025 SWING: https://logbooks.jlab.org/entry/4422977
07/21/2025 OWL: https://logbooks.jlab.org/entry/4423272

We will have 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/4423399
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