Revision as of 23:30, 10 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

Friday July 8 - Sunday July 10

Past 72 hours

• harp scans
• accelerator outage
• collected about 6B events on lead
• DAQ livetime looks much better after switching to writing data in two files simultaneously
• Friday harp scan [1] [2] extrapolation
• Hall-D beam position
  • Friday [https://logbooks.jlab.org/entry/4013160 Beni
  • Saturday Simon

Shift reports

• day shift summary
• swing shift summary
• owl shift summary
• early riser shift summary

Reports

• New high voltages were loaded for FCAL [3]
• Hovanes has updated AMO radiator position [4]

Issues

• Tagger NMR communication will be worked out this week (Tim) [5]

Plans

• Continue production on lead
• unmask FCAL modules in the trigger

Thursday July 7

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 [6] [7]
• 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 [8]

Shift reports

• day shift summary
• swing shift summary
• owl shift summary
• early riser shift summary

Reports

• Sasha checked FCAL trigger rate without masking inner layers. Preliminary result for the rate was 14kHz [9]
• Hovanes pointed out, that we don't observe 60Hz oscillations now [10]

Issues

• Problems with running at 30nA on AMO, radiator thickness was reduced to 3*10^-4 this night,

as 4.5*10^-4 was causing IOC trips [11] [12]

• Alexandre just noticed that Tagger magnet NMR communication is down again [13]
• DIRC major alarm has been acknowledged [14], Mark may need to investigate this issue more
• Dave has noticed we have a higher radiation level values now, about factor of 1.5 [15], [16]
• Hydra alarm on fa125_itrig [17]
• daq livetime is uneven from time to time [18]

Plans

• Continue production on lead
• find out the way to unmask FCAL modules

Wednesday, July 6

Past 24 hours

• Malte and Mark worked on FCAL bases replacement [19]
• One of the RF crates had been disconnected, Beni fixed it [20]
• 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 [21]
• 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 [22]) 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

• day shift summary
• swing shift summary
• owl shift summary
• early riser shift summary

Reports

• Sergey and Lubomir worked in the Hall this night from 10 pm to 11:30 pm [23]
• Hovanes reported his study of the coherent peak position drifts observed on the 4th of July [24]
• Still have 60Hz structure [25]. The situation is improved according to MCC experts.
• CDC HV and TAGM alarms are more frequent now
• CDC gas flow increased [26]

Issues

• Hovanes pointed out that something strange happened during solenoid ramping up [27] [28]

Plans

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