Difference between revisions of "Engineering Run"
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== <font color=blue>''' Run Plan:'''</font>== | == <font color=blue>''' Run Plan:'''</font>== | ||
− | ''(last update 1/ | + | ''(last update 1/20 - 8:30 pm)'' |
− | * | + | * Zero field alignment run (presently ongoing): |
− | * | + | ** Run conditions: 500 pA on Empty target, both solenoid and torus at 0 field. Electron trigger(trigger_electron_2GeV.trg). |
− | * | + | ** Take data until 11 pm. |
− | * | + | * Once the alignment run is complete: |
− | * | + | ** beam is off |
− | + | ** start ramping up the solenoid to -60% (-1450 A): call E. Pasuyk or D. Carman or RC to do it. When the current is above 700 A, ask MCC to unmask the solenoid FSD; | |
− | ** | + | ** in parallel fill the target (R. Miller is available to support the operation remotely, phone # on the whiteboard) |
− | ** | + | ** re-establish beam: 3 nA |
− | * | + | ** check the BOM rates, recalculate the FSD threshold consulting with the RC if necessary; |
− | ** beam | + | ** start ramping up the torus: call E. Pasuyk or D. Carman or RC to do it. |
− | ** | + | ** Make sure beam positions are consistent with last used values. Check the detector, halo counter and BOM rates on full target. Use FTCAL scalers to check the beam centering. Make logbook entries with snapshots of the overview epics gui and other relevant graph. |
− | ** | + | * Once fields and target are restored, take data: |
− | + | ** 1h or 50 M event with random_2gev_lt.trg trigger | |
− | * Take 2 hours runs. Monitor routinely trigger scalers, live time, monitoring histograms, CED, detector scalers. | + | ** lower the current to 2 nA and continue data taking with tr_electron_2gev_lt.trg: monitor trigger scalers and monitoring histograms (mon12) to ensure all trigger bits are properly recorded and all detectors are properly readout (compare to previous monitoring plots). |
+ | ** Take 2 hours runs. Monitor routinely trigger scalers, live time, monitoring histograms, CED, detector scalers. | ||
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* Physics studies (2 settings) 1 shift per setting: | * Physics studies (2 settings) 1 shift per setting: |
Revision as of 20:41, 20 January 2018
[edit]
Shift ScheduleShift ChecklistHot CheckoutBeam Time Accounting |
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- Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
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CLAS12 Engineering Run, Winter 2018
Beam energy 2.1 GeV (1 pass)
Important: Document all your work in the logbook!
Remember to fill in the run list at the beginning and end of each run (clas12run@gmail.com can fill the run list)
RC: Raffaella De Vita
- (757) 575-7540
- 9 575 7540 from Counting Room
- carman@jlab.org
PDL: Eugene Pasyuk
- (757) 876-1789
- 9 876-1789 from Counting Room
- pasyuk@jlab.org
- Note 1: Be very mindful of the background rates in the halo counters, rates in the detectors, and currents in the SVT for all settings to ensure that they are at safe levels.
- Note 2: At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "go". The DAQ rate should be 5 - 6 kHz (this includes a 1 kHz pulser). After DAQ prestart is complete reboot the scaler IOCs with the command: iocjscalerRestartAll.sh. Note: After each step, make sure it is complete in the Run Control message window. If a roc has crashed, find which one it is and issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions.
- Note 3: Nominal beam positions: 2C21 (X=0.0 mm, Y=0.0 mm), 2C24 (X=0.0 mm, Y=0.7 mm), 2H01 (X=0.7 mm, Y=-0.5 mm)
Run Plan:(last update 1/20 - 8:30 pm)
Beam Tuning:
When ready to get beam, turn all beamline devices ON, turn all CLAS12 detectors OFF |
General Instructions:
Every Shift:
Every Run:
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Manuals |
Epics on the web
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