Difference between revisions of "Run Planning Meeting Notes, October 14 - October 20, 2021"
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+ | =Wednesday, October 20= | ||
+ | # Last 24: | ||
+ | #* taking data till 5:20pm - 400M triggers | ||
+ | #* At 5:20pm SL dropped due to LCW/power problem; NL shut down to prevent tripping; tagger magnet ramp down https://logbooks.jlab.org/entry/3928353 | ||
+ | #* tagger magnet restored - https://logbooks.jlab.org/entry/3928399 | ||
+ | #* empty target reconstructed - https://logbooks.jlab.org/entry/3928026 | ||
+ | #* timing calibration https://logbooks.jlab.org/entry/3928409 | ||
+ | # Remaining issues: | ||
+ | #* tagger NMR not scanning (communication with accel. w.r.t. tagger magnet) | ||
+ | #* BCAL noise at 10 o'clock | ||
+ | #* Bleedthrough | ||
+ | # [https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2021.pdf Plan:] | ||
+ | #* plan for day/swing on Wednesday - maintenance | ||
+ | #** position survey CCAL - DOESN'T require RadCon survey | ||
+ | #** correct shielding at the left (downstream) PS arm | ||
+ | #** do measurements with magnetometer | ||
+ | #** FCAL work | ||
+ | #** troubleshoot the faulty FDC chiller | ||
+ | #* when the beam is back continue production at 200nA | ||
+ | |||
+ | =Tuesday, October 19= | ||
+ | # Last 24: | ||
+ | #* Target filled 9am-12pm - https://logbooks.jlab.org/entry/3927473 | ||
+ | #* harp scan results https://logbooks.jlab.org/entry/3927666 | ||
+ | #* 3pm-9:30pm very productive | ||
+ | #* starting 9:30pm bumpy night - beam down re-tuning cavities, tuning Hall A, Hall B bleedthrough | ||
+ | #* ~300M events on full target | ||
+ | #* Work on FCAL - https://logbooks.jlab.org/entry/3927498 | ||
+ | #* power switch on FDC chiller re-installed - https://logbooks.jlab.org/entry/3927527 | ||
+ | #* BCAL 10 o'clock noise might be related to left arm shielding - https://logbooks.jlab.org/entry/3927768 | ||
+ | #* FDC efficiency - https://logbooks.jlab.org/entry/3927560 | ||
+ | # Remaining issues: | ||
+ | #* tagger NMR not scanning (communication with accel. w.r.t. tagger magnet) | ||
+ | #* BCAL noise at 10 o'clock | ||
+ | #* improve communications with the accel. w.r.t. the tagger magnet | ||
+ | #* Bleedthrough | ||
+ | # [https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2021.pdf Plan:] | ||
+ | #* production 200nA | ||
+ | #* plan for day/swing on Wednesday - maintenance | ||
+ | #** position survey CCAL - DOESN'T require RadCon survey | ||
+ | #** correct shielding at the left (downstream) PS arm | ||
+ | #** do measurements with magnetometer | ||
+ | #** ... | ||
+ | |||
=Monday, October 18= | =Monday, October 18= | ||
# Over the weekend: | # Over the weekend: | ||
Line 7: | Line 51: | ||
#* two-peak structure TDC's(of all detectors) - RF https://logbooks.jlab.org/entry/3926223 solved after restarting | #* two-peak structure TDC's(of all detectors) - RF https://logbooks.jlab.org/entry/3926223 solved after restarting | ||
#* TAGM TDC calibration problem - https://logbooks.jlab.org/entry/3926306 solved after several runs | #* TAGM TDC calibration problem - https://logbooks.jlab.org/entry/3926306 solved after several runs | ||
− | #* NMR probe stop scanning https://logbooks.jlab.org/entry/3926647 https://logbooks.jlab.org/entry/3926650 | + | #* NMR probe stop scanning https://logbooks.jlab.org/entry/3926647 https://logbooks.jlab.org/entry/3926650 https://logbooks.jlab.org/entry/3927378 |
#* last bleedthrough run taken with low pulser rate https://logbooks.jlab.org/entry/3925916 | #* last bleedthrough run taken with low pulser rate https://logbooks.jlab.org/entry/3925916 | ||
#* FDC wire thresholds optimized (lowered) - https://logbooks.jlab.org/entry/3925360 | #* FDC wire thresholds optimized (lowered) - https://logbooks.jlab.org/entry/3925360 |
Latest revision as of 07:34, 20 October 2021
Contents
Wednesday, October 20
- Last 24:
- taking data till 5:20pm - 400M triggers
- At 5:20pm SL dropped due to LCW/power problem; NL shut down to prevent tripping; tagger magnet ramp down https://logbooks.jlab.org/entry/3928353
- tagger magnet restored - https://logbooks.jlab.org/entry/3928399
- empty target reconstructed - https://logbooks.jlab.org/entry/3928026
- timing calibration https://logbooks.jlab.org/entry/3928409
- Remaining issues:
- tagger NMR not scanning (communication with accel. w.r.t. tagger magnet)
- BCAL noise at 10 o'clock
- Bleedthrough
- Plan:
- plan for day/swing on Wednesday - maintenance
- position survey CCAL - DOESN'T require RadCon survey
- correct shielding at the left (downstream) PS arm
- do measurements with magnetometer
- FCAL work
- troubleshoot the faulty FDC chiller
- when the beam is back continue production at 200nA
- plan for day/swing on Wednesday - maintenance
Tuesday, October 19
- Last 24:
- Target filled 9am-12pm - https://logbooks.jlab.org/entry/3927473
- harp scan results https://logbooks.jlab.org/entry/3927666
- 3pm-9:30pm very productive
- starting 9:30pm bumpy night - beam down re-tuning cavities, tuning Hall A, Hall B bleedthrough
- ~300M events on full target
- Work on FCAL - https://logbooks.jlab.org/entry/3927498
- power switch on FDC chiller re-installed - https://logbooks.jlab.org/entry/3927527
- BCAL 10 o'clock noise might be related to left arm shielding - https://logbooks.jlab.org/entry/3927768
- FDC efficiency - https://logbooks.jlab.org/entry/3927560
- Remaining issues:
- tagger NMR not scanning (communication with accel. w.r.t. tagger magnet)
- BCAL noise at 10 o'clock
- improve communications with the accel. w.r.t. the tagger magnet
- Bleedthrough
- Plan:
- production 200nA
- plan for day/swing on Wednesday - maintenance
- position survey CCAL - DOESN'T require RadCon survey
- correct shielding at the left (downstream) PS arm
- do measurements with magnetometer
- ...
Monday, October 18
- Over the weekend:
- Target emptied Friday 5pm - https://logbooks.jlab.org/entry/3925563
- Long downtime (flooding in accel.) started 5pm on Friday, beam came for an hour in the evening and was restored 6am Saturday.
- Since then very productive: 1.25B events on empty target
- Some noise in BCAL at 10 o'clock - https://logbooks.jlab.org/entry/3927356
- two-peak structure TDC's(of all detectors) - RF https://logbooks.jlab.org/entry/3926223 solved after restarting
- TAGM TDC calibration problem - https://logbooks.jlab.org/entry/3926306 solved after several runs
- NMR probe stop scanning https://logbooks.jlab.org/entry/3926647 https://logbooks.jlab.org/entry/3926650 https://logbooks.jlab.org/entry/3927378
- last bleedthrough run taken with low pulser rate https://logbooks.jlab.org/entry/3925916
- FDC wire thresholds optimized (lowered) - https://logbooks.jlab.org/entry/3925360
- online monitoring files not copied to CUE workdisk - https://logbooks.jlab.org/entry/3926767
- archiving trigger rate - solved by David https://logbooks.jlab.org/entry/3925225
- Remaining issues:
- tagger NMR not scanning
- BCAL noise at 10 o'clock
- Bleedthrough
- Plan:
- 9am pass change - start filling the target
- install the FDC chiller power switch - https://logbooks.jlab.org/entry/3925381
- FCAL work
- after beam comes - harp scans
- plan for day/swing on Wednesday - maintenance
- position survey CCAL - requires RadCon survey prior
- install additional shielding at the left (downstream) PS arm
- do measurements with magnetometer
- ...
- 9am pass change - start filling the target
Friday, October 15
- In last 24 hours:
- power of infiniband switch tripped (one strip cord)- causing 4h UED -https://logbooks.jlab.org/entry/3924903 https://logbooks.jlab.org/entry/3925176
- group disk not mounted https://logbooks.jlab.org/entry/3925185
- trigger rate not archived https://logbooks.jlab.org/entry/3925225
- FDC chiller replaced https://logbooks.jlab.org/entry/3924510
- beacon bulb replaced - took 2h
- FDC hot wires https://logbooks.jlab.org/entry/3924538 - no more noise but higher discr. thresholds (need 30 min to optimize the thresholds)
- 6h downtime - NL cold box + other things
- harp scans - https://logbooks.jlab.org/entry/3924829 https://logbooks.jlab.org/entry/3924830 https://logbooks.jlab.org/entry/3924845 https://logbooks.jlab.org/entry/3924851
- ~400M triggers for the last 24h
- pulser left at 2kHz after the downtime https://logbooks.jlab.org/entry/3924927 - all data after that till 23:30 with 2kHz pulser - don't forget to restore pulser to 100Hz once you are done with your test
- more rootspy nodes https://logbooks.jlab.org/entry/3924610 (David)
- power of infiniband switch tripped (one strip cord)- causing 4h UED -https://logbooks.jlab.org/entry/3924903 https://logbooks.jlab.org/entry/3925176
- Remaining issues:
- fix remaining problems on gluon machines (trigger rate not archived https://logbooks.jlab.org/entry/3925225)
- Bleedthrough
- Plan:
- run till 5pm with full target, then with empty over the weekend - inform target group (Chris) when emptying/filling the target
- pass change on Monday
- day/swing on Wednesday - maintenance
Thursday, October 14
- In last 24 hours:
- FDC chiller tripped due to overheating - no chilled water flow: https://logbooks.jlab.org/entry/3923962
- Could not do rapid access - beacon bulb burned out - https://logbooks.jlab.org/entry/3924326 (lost about 40 min)
- Early riser summary: https://logbooks.jlab.org/entry/3924292
- Owl summary: https://logbooks.jlab.org/entry/3923921
- Swing summary: https://logbooks.jlab.org/entry/3923728
- Day summary: https://logbooks.jlab.org/entry/3923480
- ~400M triggers with B-field LHe 200nA + 300M without FDC
- short downtime (~30 min) HallA BLA calibration
- Run 81504 in raw mode
- Run 81505 ~40min no D laser, B,C up, A down, last minute with the D laser.
- PS background https://logbooks.jlab.org/entry/3923621 (Sasha)
- spike in beam current https://logbooks.jlab.org/entry/3923798
- Remaining issues:
- fixed the beacon and the FDC chiller
- noisy FDC wires https://logbooks.jlab.org/entry/3923747
- Bleedthrough
- Plan:
- 2 more shifts with 200 nA and target filled with He then wait for decision from Primex 4 pm meeting.