[Hallc_running] [New Logentry] RC Daily Summary August 24, 2025

[ole at jlab.org]

Logentry Text:
--
We've had another good 24 hours in Hall C, with total ABU of 18.59 hours (77% efficiency). At times, when we weren't hitting the DAQ rate limit, MCC successfully sent us 50 uA. We did not try 60 uA yet because of concerns about the accidental rate. The z=0.50 pi- theta_pq=2.0 setting was finished during OWL, and we are now on the last pi- setting of this group, z=0.36 pi- theta_pq=2.0 (pages 40-42 of the 
<a href="https://hallcweb.jlab.org/wiki/images/4/40/R_SIDIS_Run_Plan_Summer_2025_JLab_v36.pdf"> run plan</a>). Once that is finished, presumably in the second half of DAY, we will switch the SHMS polarity for the pi+ sequence.
<p>
There were essentially no problems except for one brief DAQ hiccup
<a href=https://logbooks.jlab.org/entry/4449341>https://logbooks.jlab.org/entry/4449341</a>.
<p>
There are no special plans on the accelerator side for today. We will keep running hopefully without interruption (knocking on wood) until Monday morning. We do expect beam interruption for the most part of DAY tomorrow due to the Hall B pass change and some accelerator troubleshooting (details TBD at the MCC meetings tomorrow morning).  Hall D continues to be down for the weekend (possibly longer) because of a failing power supply in Arc10. 
<p>
Shift summaries:<br>
8/23 DAY: <a href=https://logbooks.jlab.org/entry/4449071>https://logbooks.jlab.org/entry/4449071</a><br>
8/23 SWING: <a href=https://logbooks.jlab.org/entry/4449363>https://logbooks.jlab.org/entry/4449363</a><br>
8/24 OWL: <a href=https://logbooks.jlab.org/entry/4449584>https://logbooks.jlab.org/entry/4449584</a><br>
<p>
We will have a remote RC meeting at 2:30 pm today to discuss plans for Monday/Tuesday:<br>
<a href="https://jlab-org.zoomgov.com/j/1618227115?pwd=8JkhFg6YNesVc3HNgWjwUSIKIu5SvP.1">Zoom link</a><br> 
Meeting ID: 161 822 7115<br>
Passcode: 253463<br>
Dial-in: 833 568 8864<br>


---

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/4449805
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/hallc_running/attachments/20250824/f2eea6ca/attachment.htm>