Difference between revisions of "Engineering Run"
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* Take data runs for 2 hrs in duration at beam currents of 10 nA and 15 nA with the standard electron trigger (trigger_prod.trg). At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "go". The DAQ rate should be 2 -3 kHz (this includes a 1 kHz pulser). | * Take data runs for 2 hrs in duration at beam currents of 10 nA and 15 nA with the standard electron trigger (trigger_prod.trg). At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "go". The DAQ rate should be 2 -3 kHz (this includes a 1 kHz pulser). | ||
+ | * Recover from solenoid fast ramp down - Hall B access for work - Contact MVT expert (Maxime), Slow Controls expert (Nathan), beamline expert (Stepan), DAQ expert (Sergey) | ||
* Perform steering optimization of the beam and perform a set of harp scans (2C21, 2C24, 2H01) | * Perform steering optimization of the beam and perform a set of harp scans (2C21, 2C24, 2H01) | ||
* Adjust DC R2 to HV setting #10, -45 mV threshold | * Adjust DC R2 to HV setting #10, -45 mV threshold | ||
* Take data run for 2 hrs in duration at 15 nA with the standard electron trigger. | * Take data run for 2 hrs in duration at 15 nA with the standard electron trigger. | ||
* Complete a scan of beam currents at 10 nA, 15 nA, ..., Imax, where Imax will be determined by the subsystem experts working with the Run Coordinator. At each setting record rates in all detectors and currents in DC, SVT, and MM. Great care must be taken when moving to higher beam currents to ensure safety of the hardware. | * Complete a scan of beam currents at 10 nA, 15 nA, ..., Imax, where Imax will be determined by the subsystem experts working with the Run Coordinator. At each setting record rates in all detectors and currents in DC, SVT, and MM. Great care must be taken when moving to higher beam currents to ensure safety of the hardware. | ||
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* Work on studies of detector optimization. This includes: | * Work on studies of detector optimization. This includes: | ||
** Reduce the DC time windows closer to their nominal production values | ** Reduce the DC time windows closer to their nominal production values |
Revision as of 11:39, 16 December 2017
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CLAS12 Engineering Run, Fall 2017
Beam energy 10.6 GeV (5 pass)
Torus : +3200 A (85% field), Solenoid: 2416 A (100% field), full target;
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: Daniel S. Carman
- (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
Run Plan:
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General Instructions:
Beam Tuning:
When ready to get beam, Turn all beamline devices ON, turn all CLAS12 detectors OFF (including SVT)
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Every Shift:
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Every Run:
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