[Hallc_running] [New Logentry] Status update

mack at jlab.org mack at jlab.org
Thu Feb 22 10:10:03 EST 2018

Logentry Text:
After recovering from the vacuum issue, and getting Q2 up again, we took data. Isolated attempts overnite to increase the current from 40 muA to 45 muA ended in trip storms. Otherwise, productive running. The plan was to push for higher currents today, and for Hall C to support that effort by employing targets that could take higher currents, presumably LH2 or LD2.  But I (tried to) put higher currents on hold this morning until a potential virtual loss issue with the Hall C MPS BCM is resolved, since the present +-0.4 muA swings correlated with temperature are eating into the Beam Loss Accounting budget. https://logbooks.jlab.org/entry/3536337#comment-13906   Keith Cole is going to make an access to check the tune. 

Sign up for shifts!

Special notices in effect for shift crews:
Don't go higher than 610A with HMS Q2   https://logbooks.jlab.org/entry/3535714
Instructions for LH2 <--> LD2 switches by TO : https://logbooks.jlab.org/entry/3534487
Maximum current for Gaskell's bor-on-ing targets is 40 muA: https://logbooks.jlab.org/entry/3535297
Any missing reference time messages should not be ignored: https://logbooks.jlab.org/entry/3535289

Vacuum work  https://logbooks.jlab.org/entry/3535694
Q2 work on clearing interlock https://logbooks.jlab.org/entry/3535723
missing flash adc reference times  https://logbooks.jlab.org/entry/3535683

Recent calibration/analysis updates: 
Abel data/mc inclusive  https://logbooks.jlab.org/entry/3535801
calorimeter calibration  https://logbooks.jlab.org/entry/3534765 (sorry, missed this yesterday)

We will meet in 200C at 1:30 pm (second floor of the counting house). 

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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/3536399
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