[Halla_running] [New Logentry] SBS RC daily meeting: 05/13/2025

[asar at jlab.org]

Logentry Text:
--
Yesterday, beam was available around the start of the Swing shift and was recovered for physics data by 19:30. Data acquisition began at 5 µA, and approximately 10 million events were collected. For Run 3657 onwards, the beam current was increased to 10 µA, resulting in a current total of roughly 50 million events.

Several CODA crashes occurred, potentially due to discharges on GEMs, faulty APVs, and bad fibers. GEM experts mitigated these issues by reducing the voltage on modules L13M23 and commenting out vt2 fiber 6.

The accelerator went down at 10:00 to address halo rate issues in Hall B caused by Hall A bleed-through. Hall A will remain in a locked state until this work is completed (see: https://logbooks.jlab.org/entry/4374474).

The GEM group requires an escorted access to investigate a gas issue on Layer 1. This access is scheduled after MCC readiness for Hall A and before beam recovery.


Shift summary:
Day: https://logbooks.jlab.org/entry/4374381
Swing: https://logbooks.jlab.org/entry/4373945
Owl: https: https://logbooks.jlab.org/entry/4374182

Details of RC summary can be found at: https://sbs.jlab.org/wiki/index.php/RC_meeting_and_Run_Plan,_Tuesday,_May_13th

To discuss the updates and the upcoming plan, we will have RC meeting at 1:30 pm today on the second floor of Counting house and via zoom: https://jlab-org.zoomgov.com/j/1616220064
Meeting ID: 161 622 0064
Passcode: 314159

---

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/4374525
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halla_running/attachments/20250513/4e5e8dff/attachment.htm>