Difference between revisions of "Run Planning Meeting Notes, Mar 21 - Mar 27, 2019"

Revision as of 09:52, 25 March 2019

Past 24 hours:
- RF recovery during the day shift
- Beam recovery delayed due to (1) issue in the injector, resolved by evening, then (2) UPS battery needs replacement in the north linac.
Issues
- low counts seen in bcal sector (logbook entry 3670196)
Reports
- helium target refilled, ready
- trigger rate and beam flux history for Spring 2019 run
Today:
- Production: 200nA, Al 10^-4
Run Plan
- Production running: when beam returns, check beam conditions as follows:
  1. do harp scans, both accelerator and Hall D radiator
  2. check radiation monitor rates in tagger hall and Hall D
  3. verify transmission in PSC and PS coincidence rates @ 200nA, 1e-4 radiator
- Beam studies planned for day shift on Monday
- RF Recovery scheduled for Tuesday

Past 24 hours:
- beam recovery, conditions checked, running resumed.
Issues
- HV tripped on two inner FCal blocks (logbook entry 3670196)
- HV in CDC tripped, without alarm! (logbook entry 3670885)
Reports
- collimator transmission drops again (logbook entry 3670862)
Today:
- Production: 200nA, Al 10^-4
Run Plan
- Production running continues
- Beam studies planned for day shift on Monday
- RF Recovery scheduled for Tuesday

Past 72 hours:
- production running on He target until Sunday 5:30pm
- continued running on empty target through Monday 8:30am
- now in controlled access, RF recovery underway
Issues
- Ongoing issue with CDC HV readback (logbook entry 3670885, 3671598, 3671943)
- PS scalers communication issue (logbook entry 3670950)
- DAQ interruptions ~1 per shift, recovery is straight-forward ([1], [2])
- Compcal monitoring plots, timing shows double peak, considered ok (logbook entry 3671757)
- Compcal HV communication failure
- FCal HV communication failure (logbook entry 3671351)
- Individual FCal bases need reset (logbook entry 3671386, [ resolved here])
- FCal fadc scalers stop updating (logbook entry 3671880)
- Accelerator tightens AC lock constraints (logbook entry 3671930)

Reports
- Several reference plots for monitoring histograms out of date (logbook entry 3671340)
- Active collimator lock is mostly working, sometimes fights to keep up (logbook entry 3671214)
- Accelerator using machine development time to investigate this effect in Hall D
Today:
- work on solenoid during 9:00am - 12:00pm, warm-up to begin (logbook entry 3670889)
- accelerator
Run Plan
- Production running continues
- Beam studies planned for day shift on Monday
- RF Recovery scheduled for Tuesday

@@ Line 48: / Line 48: @@
 #* now in controlled access, RF recovery underway
 # Issues
-#* Ongoing issue with CDC HV readback ([https://logbooks.jlab.org/entry/3670885 logbook entry 3670885], [https://logbooks.jlab.org/entry/3671598 3671598])
+#* Ongoing issue with CDC HV readback ([https://logbooks.jlab.org/entry/3670885 logbook entry 3670885], [https://logbooks.jlab.org/entry/3671598 3671598], [https://logbooks.jlab.org/entry/3671943 3671943])
 #* PS scalers communication issue ([https://logbooks.jlab.org/entry/3670950 logbook entry 3670950])
 #* DAQ interruptions ~1 per shift, recovery is straight-forward ([https://logbooks.jlab.org/entry/3671151], [https://logbooks.jlab.org/entry/3671542])