Difference between revisions of "Check-list For taking Counting runs and Going back to Production"
From PREX Wiki
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* Before taking Counting Runs: | * Before taking Counting Runs: | ||
** Ask for low current (0.3uA for Ca-48 target for detector alignment check and <2uA for C-Hole raster check) | ** Ask for low current (0.3uA for Ca-48 target for detector alignment check and <2uA for C-Hole raster check) | ||
| − | ** Turn '''ON S0 and S3''' ('''L0.0, L0.1, L0.2, L0.3, L0.4''' in both arm's HV GUI). Follow [[HVgui]] | + | ** Turn '''ON S0 and S3''' ('''L0.0, L0.1, L0.2, L0.3, L0.4''' in both arm's HV GUI). Follow [[HVgui | Checking the HV]] HOW TOs for shift crew if you need to |
** For Raster check on '''C-Hole''', you can start runs once the '''position and HV read-back are settled''' | ** For Raster check on '''C-Hole''', you can start runs once the '''position and HV read-back are settled''' | ||
** For Detector alignment Check, | ** For Detector alignment Check, | ||
Revision as of 14:26, 5 February 2020
- Before taking Counting Runs:
- Ask for low current (0.3uA for Ca-48 target for detector alignment check and <2uA for C-Hole raster check)
- Turn ON S0 and S3 (L0.0, L0.1, L0.2, L0.3, L0.4 in both arm's HV GUI). Follow Checking the HV HOW TOs for shift crew if you need to
- For Raster check on C-Hole, you can start runs once the position and HV read-back are settled
- For Detector alignment Check,
- make sure the T1 rate is ~200k
- turn ON VDC (L6.0, L6.3 in LHRS and L4.5, L4.7 in RHRS) if the T1 rate is good
- set Downstream MAIN detectors HV to -1900V (L1.1 in both arms), and turn them ON
- once the position and HV read-back are settled, take runs
- Once you are done with counting Runs:
- Turn OFF S0, S3, Downstream MAIN detectors, and VDCs and set Downstream MAIN detectors HV to 0.0V
- Ask for high current (production) only after turning OFF the detectors mentioned in the previous step
