Revision as of 08:38, 10 December 2021

MCC whiteboard

Thursday December 10

1. Last 24h:
   • Took one AMO run (Run 90474)
   • Continued C production running.
2. Issues
   • Downtime Incidents: RF separators tripped off and simultaneously MBD5C10V Mismatch from 7:30 - 9:30 am [1][2]
   • There were multiple alarms reported on FDC, BCAL, ST, PS, DIRC. All of them became half green immediately. Clear after acknowledged them and the shift crew checked the corresponding panels, everything seemed normal.
   • One channel in the FDC tripped and was power cycled
   • DAQ frozen and rebooted (Day shift)
   • Coherent peak instable for 45/135 PARA [3]
   • One base lost communication and FCAL bases were reset [4]
3. Plans
   • Compton run, Low intensity and Trigger studies over the weekend.
   • Continue C production.
   • No RC meeting during the weekend. RC summary will be posted in the logbook with copy to the Hall D mailing list. Next RC meeting: Monday Dec 13 at 8:45 am

Wednesday December 9

1. Last 24h:
   • Start counter dark rate test, Run 90454 [5] (Beni)
   • 1 FCAL base changed [6] (Mark)
   • FADC replaced in the tagger crate[7] (Sasha)
   • PWO modules and lead scint glass installed in the PS setup [8] (Sasha)
2. Issues
   • Hall D beam stopper cause almost four hours of down time [9] We recovered the beam at 15:20 pm. The biggest suspect is an air pressure issue that caused a "beam stopper stuck" fault within PLC. The cause needs further investigation.
   • Solenoid dump due to a lost communication with both VCL flows for over 1 minute [10][11] (Tim & Nick)
   • Solenoid ramping up, from 19:50 pm (Dec 8) to 4:30 am (Dec 9) up to 1360 A (Tim & Beni). Waited for 15 minutes and ramp down to 1350 A (Phoebe, Jackson & Nathaly) [12][13]
   • Current major event, Separators tripped [14]
3. Plans
   • Continue running with C
   • AMO run
   • Raw mode run
   • Beam Studies next Tuesday (accelerator), Dec 14