[Rgc] [New Logentry] RC Daily Summary

[akbar at jlab.org]

Logentry Text:
--
Since Today we will swap the target to CH2. I will start with the NH3 statistics that we run and collected since last Friday (9/23/2022):
Positive In : 272.13 Millions
Positive Out: 183.43 Millions
Negative Out: 114.5 Millions
Negative In: 125.9 Millions

General summary from Wednesday-Day (9/28) to Thursday-Owl (9/29):
- In general the beam is better than previous days. We got ABU for 288 hours (Day shift), 247 hours (Swing shift) and 304 hours (Owl shift).
- We did polarization flip during Day shift. The polarization before flip was positive ~72% and after flip, the maximum polarization was negative ~67%
- During the run, the polarization was relatively stable > ~65% (negative)
- The Half-wave plate was switched from OUT to IN during the swing (at round 8 PM)
- Detector Issue: No major Issue, a few trips in BMT which were fixed by resetting and increase the current for the trip limit and lower the voltage. Also one RICH alarm due to some zero scalers which is fixed by the expert in a short time.

Accumulated events:
Wednesday Day: 86.84 M (6.5 hours)
Wednesday Swing: 59.4 M (5 hours)
Thursday Owl: 94.4 M (5.75 hours)

Total: 240.64 M events from ~13 hours of running time

Current work in the hall
1. Target group is working on TE measurement
2. Vacuum pump installation
3. Dan Carman and one technician are working on the CND electronics

Plan:
1. Change the target to CH2 
2. When the beam is back (mid swing), run the harp scan and then run with 8 nA of production run for at least 24 hours

We will have RC Meeting at 2 PM Today at https://jlab-org.zoomgov.com/j/1608674253?pwd=SFZyYmZLWXJieGtpV2dEdVRiUEJnUT09&from=addon

Best Regards,

Zulkaida Akbar



---

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/4048493
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/rgc/attachments/20220929/22a25403/attachment.html>