Difference between revisions of "Run Planning Meeting Notes, Mar 04-Mar 11, 2020"

Latest revision as of 06:53, 12 March 2020

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Wednesday, March 11

1. Last 24 hours
   • Vacuum valve closed: opportunistic access for CCAL and FCAL until ~3 pm
   • CCAL bases replaced and closed up for TAC run with low current while Hall C is offline (3/13-3/20)
2. Reports/Issues
   • BCAL VME crate rebooted yesterday afternoon but random and PS pulser restarted this morning
   • Slow beam drifts [1]
   • New FCAL channel failure near beam hole
   • Top bubbler at the add line (will be addressed today)
   • RCDB error partially fixed for run 72158
3. Run Plan
   • Production

Tuesday, March 10

1. Last 24 hours
   • Pedestal run addressed BCAL hot channel, followed by production running
   • Vacuum valve closed (investigation underway): Opportunistic access now(?)
2. Reports/Issues
   • Rates and their ratios (Alexandre)
   • Energy jump (Alexandre)
   • BCAL LED pulser is working [2] [3]
   • Monitoring: FDC occupancy
   • Reminder for Shift Leaders (Elton)
3. Run Plan
   • Opportunistic access for FCAL and CCAL
   • Production after access

Monday, March 9

1. Last 72 hours
   • Issues with delivering full current to A/C. Back up now, but no RF recovery planned/available to recover gradient(?)
   • Production running when beam available over the weekend
2. Reports/Issues
   • Rates instability: "dips" in rate on Friday evening.
     • beam off to other halls showed no change to PS rate
     • Harp scan taken during dip: analysis by shift crew (HALO:T:gamma) and Hovanes (HALO:T:electron) and Jay's convergence
     • Since then the rate has been ~stable
   • Multiple processes running to different edge fitting scripts caused fluctuations (Mark D)
     • New edge fitting script in use to better monitor edge and width (Mark D)
   • Collecting events before run start
   • Monitoring: BCAL hot channel and in monitoring--> pedestal calibration needed (Mark)
   • something weird is fixed, was a bad ADC channel (Beni)
   • gluonraid2 filled up and emptied by hand (David)
   • Bad data from CAEN HV and intermittent LINK alarms (Hovanes)
3. Run Plan
   • Production
4. Longer term
   • Hall C down for configuration change 3/13-3/20. Good opportunity for low current TAC run.

Friday, March 6

1. Last 24 hours
   • Limited beam yesterday morning, followed by Hall access for Solenoid VCL work (Scot/Mark)
   • Steady production evening and overnight
2. Reports/Issues
   • Rates instability: Added additional beam positions to "default" MyaViewer
     • No major instability overnight. Still plan to request other Hall beam off and Harp Scan if another "dip" in rate of 30% or more is identified by shift crew.
     • Look back at other halls during previous instabilities (Alexandre)
   • Fluctuating coherent edge for 45/135 PERP (Naomi)
   • ρ and ω yield/trigger (almost) back to nominal values:
     • Initial CCDB time stamp update (Alex)
     • Followup to revert TOF timewalk calibration (Beni)
   • something weird (Beni)
   • Updated reference plots: thanks Naomi! Experts please check your e-mails. [4]
   • Bad data from CAEN HV and intermittent LINK alarms (Hovanes)
3. Run Plan (Friday + Weekend)
   • May be some additional (short) injector tuning (A2 interception) today to keep Hall A's charge asymmetry down.
   • Production
4. Longer term
   • Hall C down for configuration change 3/13-3/20. Good opportunity for low current TAC run.

Thursday, March 5

1. Last 24 hours
   • Beam off until Wednesday @ 5 pm for injector work
   • FCAL work and restoration
     • New PDU installed (Nick)
     • Restoration: [5][6] (Nick/Colin)
   • Solenoid Vapor Cooled Lead (VCL) temperature drop (Mark)
2. Reports/Issues
   • Accelerator status GUI (Naomi)
   • Tagger magnet NMR signal (Tim)
   • Tagger field change to photon energy calibration (Richard)
   • Bad data from CAEN HV and intermittent LINK alarms (Hovanes)
   • ρ and ω yield/trigger back to nominal values: e.g. Run 72076 (Alex)
     • Change of timestamp (Logbook entry?)
   • Rates instability (Alexandre)
3. Run Plan
   • Opportunistic access for solenoid work in parallel with injector tuning (1:00 pm)
   • Production