Difference between revisions of "Shift crew procedures"
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# Check whether the laser is still flipping (EPICS channel cComptCavityPower). | # Check whether the laser is still flipping (EPICS channel cComptCavityPower). | ||
#:This should be obvious from the camera as well. If not flipping, call an expert. This EPICS PV should be visible on the desktop of Striptools on ccomptl1. | #:This should be obvious from the camera as well. If not flipping, call an expert. This EPICS PV should be visible on the desktop of Striptools on ccomptl1. | ||
| − | # Monitor the background scintillator rates. cComptScintRateNorm should stay below 200 Hz/uA. | + | # Monitor the background scintillator rates. cComptScintRateNorm should stay below '''200 Hz/uA.''' |
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#: The HV controls should be open on one of the ccomptl1 desktops. If not log on to cdaql4 as cvxwrks and cd to $EPSHV/tk then run /HV_compton.tcl and turn on PhotonDet_6.<br> | #: The HV controls should be open on one of the ccomptl1 desktops. If not log on to cdaql4 as cvxwrks and cd to $EPSHV/tk then run /HV_compton.tcl and turn on PhotonDet_6.<br> | ||
# If the photon detector HV trips again within 15 minutes, call an expert.<br> | # If the photon detector HV trips again within 15 minutes, call an expert.<br> | ||
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=== Experts on call === | === Experts on call === | ||
Revision as of 17:28, 28 January 2011
Compton Procedures Sheet (short version for shift workers)
General Compton running:
- At least once every hour restart a new CODA run. CODA should be open on one of the desktops of ccomptl1.
- At least once every hour check the status of the HV. If a trip occurred, see below.
- Check whether the laser is still flipping (EPICS channel cComptCavityPower).
- This should be obvious from the camera as well. If not flipping, call an expert. This EPICS PV should be visible on the desktop of Striptools on ccomptl1.
- Monitor the background scintillator rates. cComptScintRateNorm should stay below 200 Hz/uA.
After a photon detector HV trip:
- Check that the normalized rate on the background scintillator (EPICS channel cComptScintRateNorm, or manually normalize hcrate14) is still below 150 Hz/uA (200 Hz/uA is tolerable, <150 Hz/uA is "good").
- This EPICS PV should be visible on the desktop of Striptools on ccomptl1. If not, call an expert.
- This EPICS PV should be visible on the desktop of Striptools on ccomptl1. If not, call an expert.
- Wait 5 minutes after the trip and turn on the HV on the photon detector to 1600 V (channel PhotonDet_6).
- The HV controls should be open on one of the ccomptl1 desktops. If not log on to cdaql4 as cvxwrks and cd to $EPSHV/tk then run /HV_compton.tcl and turn on PhotonDet_6.
- The HV controls should be open on one of the ccomptl1 desktops. If not log on to cdaql4 as cvxwrks and cd to $EPSHV/tk then run /HV_compton.tcl and turn on PhotonDet_6.
- If the photon detector HV trips again within 15 minutes, call an expert.
Experts on call
Experts:
- Dave Gaskell, pager gaskelld-page@jlab.org, cell 719-5482
- Don Jones, cell 768-1148
- Amrendra Narayan, cell 952-6126
- Wouter Deconinck, pager 238-4235, cell 927-2413
Schedule:
- January 12 - January 19: Don Jones
- January 20 - January 26: Dave Gaskell
- January 27 - February 3: Amrendra Narayan
