Run Planning Meeting Notes, August 13 -17, 2020

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Integrated trigger count

GlueX Statistics Run Sheet

Friday, August 14

1. Weekend Running
   • Since 20:00 Friday, we collected 8.5B triggers (~3.4B/day)
   • Beamline pump failed (8/15, 11am) 2nd time in 3 days, lost about 1 hour beam time.
   • CHL Trip (8/16, 8am) 6 hours down time.
   • Two Harp scan results: Convergence 8/16, []
2. Reports/Issues
   • Changed defaults for harp fitting tool sigmas (Richard)
   • FCAL Scaler missing channels
   • Ps/trigger ratio: 8/16/2020 8/14/2020
3. Pending issues:
   • TagM cards being debugged
   • TAGH Disc counter not functioning properly
4. Run Plan
   • 4 hour maintenance tomorrow 8:00 - 12:00, bring back LC100 reduce 40 faults a day on south linac. (currently 7 trips from north linac and 17 from south per shift).
   • Hall C path change (Jay;s comment/suggestion): once or twice tune beam into the hall a shift to engage the BPM. Past experience shows no issue running with 200 nA. 350 is unknown, he needs to try it to see.

Friday, August 14

1. Last 24 hours
   • Stable-ish beam through yesterday to this morning, ~1.3 B triggers collected
   • Beamline Turbo pump controller failed, Keith came in and fixed the issue. Lost 2 hour beam time [1] [2] Pump failing
2. Reports/Issues
   • New 45/135 coherent peak edge Perp Para
     • 45/135 new spot is close to the diamond edge, we need to pay attention to the rate.
   • Need to pay special attention to the coherent peak position
     • Amount of adjust (to the coherent peak) is increased (45/135) each time we change orientation
     • Amo to 0/90 para requires (Beni)
   • Beam drift due to lost beam lock. [3]
   • Hodoscope disc [4]
   • Missing FCAL channels due to the lost communication FCAL controller last night this morning
3. Pending issues:
   • TagM card issue:
   • FCAL remote controller PDU reset. (No reset planned for other three PDUs)
4. Run Plan
   • No long beam trips, no harp yesterday. Next harp scan?
   • Production
   • Hall C path change tentatively at August 24th (for three days). Question regarding beam stability and maximum current is raised to Jay, being discussed amount experts. Possible solution: tune beam two a shift to stabilize the lock; Use AD00 BCM as BPM, etc. Jay will get back to me.
   • CPP installation:
     • CPP's preference: schedule the CPP test after Aug 21.
     • Maintenance schedule to be decided.

Thursday, August 13

1. Announcement
   • Current run period has be extended to September 21.
   • Updated shift list
2. Last 24 hours
   • Unstable beam yesterday swing shift due to Hall C Moller measurement: 4:00-7:00 pm, 350nA tripping off AD00, unstable 240 nA available.
   • Stable beam established after 7:30 pm yesterday.
   • Diamond (JD-105 45/135) alignment completed by Hovanes during his shift
   • TAGH scan completed by Sasha during his shift [5]
3. Reports/Issues
   • Monitoring link (Twice a day monitoring line) is slow last night. [6]
   • DIRC LV tripped due to the current off during swing [7]
4. Run Plan
   • Next harp scan?
   • Production
   • Hall C path change tentatively at August 24th (for three days). Impact initial 3 days of running without orbit lock (Hall A is off in the same time), 350nA beam will trip AD00.
   • CPP installation:
     • CPP's preference: schedule the CPP test after Aug 21.
     • Installation to be completed during the next maintenance day. Date undecided, Jay will inform me as soon as he decided.
5. Report/test
   • DIRC/COMCAL HV CAEN reboot test (Hovanes)
   • Small beam energy-current correlation (Alex)
6. Pending issues:
   • TagM card issue, any update?