[Halla_running] [Revised Logentry] RC daily updates

crowder at jlab.org crowder at jlab.org
Thu Jul 25 14:55:08 EDT 2019


Logentry Text:
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Currently Pete Francis is in the Hall trying to fix the BPMs (1H04Ac and Ec) and will be moving the RF modules as far from the beamline as possible.  We are also trying to reach John Musson about the BCMs.

We had a good day yesterday!

The MOLLER team completed the spin dance around the beginning of swing
We aligned the main detectors and took some alignment data for the AT detectors
We completed a Qsq measurement
The Compton photon detector is NOT broken
Near the end of swing we started taking production data at 70uA  (after Devi adjusted the HV for the main detectors) 

There were some various problems that came up during the night: 

"run999999" location moved, causing some confusion - couldn't run Panguin anywhere but adaq1
BPM cuts in charge feedback kept it from feeding back on Hall A
BPMs 4Ac, 4Ec lost communication
large BCM widths

Further work:

Look at the alignment data for the AT detectors; Ryan, Seamus and Sereres will make a plan for aligning them (we do need these!) (Ryan)
Check the parity feedback and be more careful about the cuts that are standard (they don't need to be so tight?) (Amali)
Move BPMs away from beamline (Pete Francis)
Fix BCMs (could run unhappily with additional width but hopefully won't have to) (John Musson)
Re-analysing runs from last night with different BPMs so we can check other things (BCMs will still be not ideal) (Tao, Devi)




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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/3709675
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