[Rgc] [Revised Logentry] Owl Shift Summary

[vsaonau at jlab.org]

Logentry Text:
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00:00 Continue taking data on NH3 for runNumber 17750. 24M events so far. 
00:40 MCC called. There is an issue with an RF cavity. They called and expert to check and there is no time estimate yet. 
00:40 End run 17750 with 27M triggers. 
01:05 MCC called telling that the beam will be back soon. 
01:10: Start run 17751 with 4nA beam current on NH3 target. 
01:45 Beam went down for RF work. They said 10 minutes. 
02:25 Beam is back. We continue run 17751. 
02:50 HV trip in one strip in BMT. turned off then ON. a logbook entry is pushed here https://logbooks.jlab.org/entry/4147375
03:13 The same BMT strip channel has tripped again. 
03:36 The same BMT strip channel has tripped again. 
04:42 The same BMT strip channel has tripped again. 
04:55 The same BMT strip channel has tripped again. 
05:10 End run 17751 with 49M triggers. starts RICH recovery. 
05:20 RIch recovery is done. Starting run 17752.
05:22 The same BMT strip channel has tripped again. 
05:27 Called Yuri Gotra regarding BMT sec2 L1 strip channel. He instructed to change Vset from 500V to 480 and Iset from 2uA to 3uA for this particular channel. If it persists, he suggested to change Vset to 470V.  
07:55 MCC called. They have to work on an RF cavity. Estimated time is 25 minutes. 
07:55 End run 17752 with 31M triggers. 


08:00 Summary of the shift 
ABUs:301 minutes
BNA:180 minutes 
Total number of events: 108M triggers on NH3 

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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/4147300
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