Revision as of 09:54, 2 October 2021

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Saturday, October 1, 10:00 am

1. In last 24 hours:
   • Early Riser summary
   • Owl summary
   • Swing summary
   • Day summary
2. Issues:
   • Issues with reference plots
   • Problems starting a new run (Mark/Sergey)
   • BCAL hot channel?
   • Top Alcohol Bubbler should be refilled
   • Beam quality (and chamber trips)
     • Convergence seems good (Hovanes performed PS harp scans [1][2]).
     • Bleedthrough .. more likely get worse when Hall A comes on line on Wed.
     • Bleedthough today
3. Plan:
   • After this 10:00 meeting, we will stop 50 nA production and turn off chambers (Lubomir is on shift), then Sasha will perform rate scan (it will take 40 min). After that, we will move on to 100 nA production.
   • 100 nA CDC & FDC turn off (2 shifts)
   • 200 nA CDC & FDC turn off (8.4 shifts)
   • Remove Be target to take empty target (will take 8h)
     • On Tuesday, there will very likely be a down time (beam studies or another attempt to fix the Hall C tune mode generator).
     • Hall A will come on line on Wed. (tentative schedule)
   • For shift workers: FCAL scaler should be checked frequently.

Friday, October 1

1. In last 24 hours:
   • Beam came back around 17:40. After 2h long downtime and DAQ trouble, production runs started at 2:42 am.
     • Radiation Level: OK
     • Harp scan: OK
   • Early Riser summary
   • Owl summary
   • Swing summary
   • Day summary
   • Main trigger normalized rate is 25% lower with CDC/FDC turned on (Alexandre)
2. Issues:
   • FCAL Trigger issue (Sasha)
   • FCAL FADC scalers disconnected
   • Bleedthrough
3. Plan:
   • 50 nA with CDC & FDC turn on (2 shifts), Lubomir must be around
   • 100 nA CDC & FDC turn off (2 shifts)
   • 200 nA CDC & FDC turn off (8.4 shifts)
   • Remove Be target to take empty target (will take 8h. on Monday?)
   • For shift workers: FCAL scaler should be checked frequently.

Thursday, September 30

1. In last 24 hours:
   • Machine maintenance ended around 21:20, but we don't have a beam as of 8:30 (injector non-colinearity, 5E03 BLM trips, ...).
   • Early Riser summary
   • Owl summary
   • Swing summary
   • Day summary
   • During downtime for maintenance:
     • BCAL pedestal calibration (Sergey)
     • FCAL base replacementCommunication issue resolved(Rebecca/Mark/Malte)
     • FCAL HV scan (Igal)
   • Timing calibration update (Sean)
   • Beni started Special Run 81291 for SC dark rate at 8:30 remotely. (will take ~0.5h)
2. Issues:
   • Strange behavior in FCAL base (Rebecca/Mark/Malte)
   • 5 FCAL bases don't reach 1800V (Mark/Malte)
   • Bleedthrough
3. Plan:
   • Before taking data: check radiation level and beam quality (HARP scan)
   • 50 nA with CDC & FDC turn on (2 shifts), Lubomir must be around
   • 100 nA CDC & FDC turn off (2 shifts)
   • 200 nA CDC & FDC turn off (8.4 shifts)
   • Remove Be target to take empty target (will take 8h. on Monday?)