Difference between revisions of "Engineering Run"
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* 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). 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 an issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions. | * 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). 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 an issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions. | ||
− | * | + | * MCC will setup the machine to provide a "witness" beam for Hall B and tune the beam to our Faraday Cup |
− | * Take data run with the production electron trigger with modified prescale factor on ECIn. Contact Cole Smith for directions. | + | * Start the DAQ with the production electron trigger (trigger_electron.trg) with beam currents in the range from 10 nA to 70 nA. Be sure to record rates in all detectors and currents in the DC, SVT, MM at several discrete steps. |
+ | * Take data run with the production electron trigger with modified prescale factor on ECIn. Contact Cole Smith for directions on the trigger file and the beam current. | ||
* Complete a scan of beam currents at 10 nA, 15 nA, 20 nA using the random trigger (random_only.trg) with the nominal production DC readout time windows. At each setting record rates in all detectors and currents in DC, SVT, and MM. Take 10 min of data at each setting. Enter DC occupancies from mon12 in the logbook. Data should only be taken if the beam tuning is very stable. The pulser should be stopped if beam goes off during the run. To stop/start the pulser without stopping the run, use the commands tcpClient trig1 'tsDisableRandomTrigger()' (to stop) and tcpClient trig1 'tsSetRandomTrigger(1,5)' (to start). | * Complete a scan of beam currents at 10 nA, 15 nA, 20 nA using the random trigger (random_only.trg) with the nominal production DC readout time windows. At each setting record rates in all detectors and currents in DC, SVT, and MM. Take 10 min of data at each setting. Enter DC occupancies from mon12 in the logbook. Data should only be taken if the beam tuning is very stable. The pulser should be stopped if beam goes off during the run. To stop/start the pulser without stopping the run, use the commands tcpClient trig1 'tsDisableRandomTrigger()' (to stop) and tcpClient trig1 'tsSetRandomTrigger(1,5)' (to start). | ||
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* Perform DC HV/threshold study with settings #8, #9, #9 for R1, R2, R3 with thresholds of -20 mV, -30 mV, -30 mV. | * Perform DC HV/threshold study with settings #8, #9, #9 for R1, R2, R3 with thresholds of -20 mV, -30 mV, -30 mV. | ||
* Complete calibration runs at beam currents of 25 na, 50 nA, and 75 nA. Take 2 hr of data at each setting. Data should only be taken if the beam tuning is very stable. | * Complete calibration runs at beam currents of 25 na, 50 nA, and 75 nA. Take 2 hr of data at each setting. Data should only be taken if the beam tuning is very stable. |
Revision as of 12:51, 17 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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