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:

1. Reports/Issues
   • Ps/trigger ratio: 8/16/2020
   • Changed defaults for harp fitting tool sigmas (Richard)
   • FCAL Scaler missing channels

1. Pending issues:
   • TagM cards being debugged
   • TAGH Disc counter not functioning properly

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?