[Hallc_running] [New Logentry] RC update, Jul 7 2022

berdnik at jlab.org berdnik at jlab.org
Thu Jul 7 10:35:02 EDT 2022

Logentry Text:
1)I got the RC phone at noon yesterday in the middle of RF recovery/maintenance day, MCC highlighted work done here: https://logbooks.jlab.org/entry/4012118
    During this time hallC was at controlled access and we performed some maintenance as well:

     * Dave Meekins fixed HallC target tachometer issues by replacing the tachometer readback chassis https://logbooks.jlab.org/entry/4011847 
     * Ellen Becker investigated the source of HMS Q1 interlocking https://logbooks.jlab.org/entry/4011819 
     * Robert Michaels rebooted HMS hut laptop https://logbooks.jlab.org/entry/4011749
     * HallC tech removed water from HMS A/C condensation          
     * HallC warm return flow was switched from CHL to ESR https://logbooks.jlab.org/entry/4011709

     * Magnets was restored to Q2 = 6.00 W=3.19, x=0.39, high ϵ setting (centre) setting 

2)MCC had issues with beam restoration and CW beam showed up at the very end of SWING shift. 
    *HMS Q1 interlocked around 20-00 but was reset by shift crew https://logbooks.jlab.org/entry/4011963 https://logbooks.jlab.org/entry/4011973 

3)MCC tried to deliver 80uA during OWL but unfortunately got only about 50uA for a while and get back to 40uA for the second part of OWL. We put Dummy target but beam was very unstable.

4)At the beginning of DAY shift we took 1h Dummy run with a more or less stable beam and later switched to LH2 to continue physics production on this setting.  

We'll have a meeting today at 11am  
Zoom  - https://jlab-org.zoomgov.com/j/1607100885?pwd=ZFBsRTFsYm5Zb0laZ0tyZXNjcEE0QT09 


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/4012181
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