Difference between revisions of "Run Planning Meeting Notes, July 07 - July 14, 2022"

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* Dominion Power's work required a voltage reduction so we had tagger, PS and sweep magnets off for a couple of hours
 
* Dominion Power's work required a voltage reduction so we had tagger, PS and sweep magnets off for a couple of hours
 
* collected cosmics and LED runs during daytime, and production on lead (about 8 hrs) during night time
 
* collected cosmics and LED runs during daytime, and production on lead (about 8 hrs) during night time
 +
* Beni: beam was quite stable overnight [https://logbooks.jlab.org/entry/4012625]
  
 
=== Shift reports ===
 
=== Shift reports ===

Revision as of 08:34, 8 July 2022

Back to Run Coordination Meetings:Summer2022

Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

MCC whiteboard

Hall D counting room white board

Spreadsheet with list of runs

Thursday July 8

Past 24 hours

  • harp scans were done during short beam on period during day-time, some distributions show 1/100 peak/shoulders ratio others 1/10,000 [1] [2]
  • Dominion Power's work required a voltage reduction so we had tagger, PS and sweep magnets off for a couple of hours
  • collected cosmics and LED runs during daytime, and production on lead (about 8 hrs) during night time
  • Beni: beam was quite stable overnight [3]

Shift reports

Reports

  • Sasha checked FCAL trigger rate without masking inner layers. Preliminary result for the rate was 14kHz [4]
  • Hovanes pointed out, that we don't observe 60Hz oscillations now [5]

Issues

  • Problems with running at 60nA on AMO, radiator thickness was reduced to 3*10^-4 this night,

as 4.5*10^-4 was causing IOC trips [6] [7]

  • Alexandre just noticed that Tagger magnet NMR communication is down again [8]
  • DIRC major alarm has been acknowledged [9], Mark may need to investigate this issue more
  • Dave has noticed we have a higher radiation level values now, about factor of 1.5 [10], [11]
  • Hydra alarm on fa125_itrig [12]
  • daq livetime is uneven from time to time [13]

Plans

  • Continue production on lead
  • Unmasking FCAL modules


Wednesday July 7

Past 24 hours

  • Malte and Mark worked on FCAL bases replacement [14]
  • One of the RF crates had been disconnected, Beni fixed it [15]
  • Bobby and others worked in the tagger hall during the day. At 3:30 pm Bobby noticed that the IOC for the NMR was not responding properly. MCC rebooted the IOC crate. Afterward, it was still locked on zero and there was still a Comm Status error [16]
  • Beni found that the solenoid controls hung, and restarted the ramping, which was helpful.
  • Had minor issues with DAQ at 7.00 pm: ROCFDC11 error: timeout error on FA125, every 3 seconds. (fADC125 in fdc11 slot 3 was replaced during daytime [17]) Sergei worked out the DAQ issue at 7.50 pm
  • Established operating field of the solenoid at 8:30 pm.
  • harp scans are ongoing now

Shift reports

Reports

  • Sergey and Lubomir worked in the Hall this night from 10 pm to 11:30 pm [18]
  • Hovanes reported his study of the coherent peak position drifts observed on the 4th of July [19]
  • Still have 60Hz structure [20]. The situation is improved according to MCC experts.
  • CDC HV and TAGM alarms are more frequent now
  • CDC gas flow increased [21]

Issues

  • Hovanes pointed out that something strange happened during solenoid ramping up [22] [23]

Plans

  • Continue production on lead
  • Unmasking FCAL central modules from the trigger needs to be done unless it increases rate too high