[Alert_collaboration] [New Logentry] RC Summary July 23 - July 24 Owl

[schmidta at jlab.org]

Logentry Text:
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This is the RC summary for Day Shift July 23 through Owl shift July 24.
 
Yesterday was a maintenance and RF recovery day. The half-wave plate was taken out. The target gas was switched back to He-4. During the down time, several tasks were completed in the hall, including
- The 2C24 vacuum gauge head was replaced (https://logbooks.jlab.org/entry/4424993)
- A PMT on the ECal was replaced. (https://logbooks.jlab.org/entry/4425062)
- The ice ball that had formed on the VCL was dealt with (https://logbooks.jlab.org/entry/4425093)
- A flow meter on the toroid was replaced (https://logbooks.jlab.org/entry/4425207)

Restoration of beam began around 18:00. A Moeller run was conducted (https://logbooks.jlab.org/entry/4425284), measuring a polarization of 89.4 +/- 1.3 %. Restoration was set back by an hour due to a comms error on a magnet in the hall (https://logbooks.jlab.org/entry/4425343) but DC power got it sorted out. After an ATOF trip sequence (https://logbooks.jlab.org/entry/4425464), production running was resumed in owl shift around 01:00, and data taking was smooth over night.
 
ABU for last 24h
 
- 6.9h of ABUs ~ 29% efficiency,
 
- Total ABUs since April 5th: 1163.4+6.9=1170.3 --> 1170.3  / (75.5 * 24) = 64.6% 
 
- Day 110 of 151 scheduled: 110/151= 72.8%
 
- BANU: 6.1h due to restoring beam after the shut down, ATOF trips, DAQ crashes
 
Plan for today:
* Production on He with 325nA

RC meeting:

The RC Meeting will be part of the weekly ALERT Meeting today, at 10:00 (EST) in CH Room 200C and online via Zoom

Zoom meeting ID: 981 7906 3617
Passcode: 252073
Zoom Link: https://ijclab.zoom.us/j/98179063617?pwd=NjVTaisxY1d6eTVjM25LNFlMUW9QZz09



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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/4425731
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