Instructions for shift takers
From Hall A Wiki
Shift-worker responsibilities
Every one taking shift should have read, understood and sign the [safety documentation] off the experiments.
Shift Leader
- Follow the runplan and communicate with RC or experts whenever problems happen that cannot be solved by shift workers.
- Maintain data taking quality and an efficient use of beam time.
- Follow the directives in the COO
- Log the following in a shift summary:
- run list (describing the goal of this run: eg production on LH2, BMC calibration ...) and report main statistic numbers main stat howto
- all major events including accesses.
Target Operator
- Watch the target, see Target Info
- Since being TO is easy, please help the shift leader and third person.
Third person
- Start and stop the DAQ.
- Do online replay of all production runs;
- Compare replay histograms with the sample ones and report to shift leader any unexplained differences. Halog them.
- Fill the shift ([check list]) once a shift.
- The shift leader or TO can help.
Beam Recovery Procedure
Update: October 24, 2010.
- Empty target, establish correct beam position
- 5 uA empty target
- BPM4A (X,Y) = ( 0.0, 0.0) mm
- BPM4B (X,Y) = ( 0.0, 0.0) mm
- See white board for updates on these.
- Tolerances on these : +/- 0.3 mm
- In standard configuration we run without the raster (ok on cryotarget if beam current is less than 5uA)
- Put in BeO target, for visual check of spot (if camera still works)
- 10 uA rastered beam on BeO.