Instructions for shift takers
From Hall A Wiki
Before the start of your shift:
- Read, understand and sign the safety documentation of the experiments.
Responsibilities
Shift Leader
- Communicate clearly and effectively with shift crews and MCC, and log any status information to the HALOG
- Keep track of beam time accounting
- Consult the daily run plans and communicate with run coordinator and 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 in the HALOG:
- run list (describing the goal of this run: eg production on LH2, BMC calibration...) and report main statistics numbers
- any major events, including accesses
Target Operator
- Watch the target, see Target Info
- Assist 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 shift checklist once per shift (for guidance, please see the checklist how-to). If both the Shift Checklist and the Shift Checklist How-to need to be modified, the original .doc files can be obtained from | DVCS ELOG entry 255.
- The shift leader or TO can help.
Beam Recovery Procedure
Update: October 24, 2010.
- Empty target, establish correct beam position</li>
- 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.