Difference between revisions of "Tune Photon Beam"
From Hall D Ops Wiki
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#* No target in place (use air along beamline as target). | #* No target in place (use air along beamline as target). | ||
# Activities | # Activities | ||
| − | #* (High) Use the beam profiler to move the photon beam to the hole in the collimator. | + | #* (High) (Accel., HallD) Use the beam profiler to move the photon beam to the hole in the collimator. |
| − | #* (High) Check radiation levels in the collimator cave and HallD. | + | #* (High) (RadCon) Check radiation levels in the collimator cave and HallD. |
| − | #* (High) Turn the PS magnet on and install a 10<sup>-3</sup> converter. Tune the PS coarse detectors | + | #* (High) (HallD) Turn the PS magnet on and install a 10<sup>-3</sup> converter. Tune the PS coarse detectors. |
| − | #* (High) Use the PS wire scanner and the coarse detectors to verify the beam location. | + | #* (High) (HallD) Use the PS wire scanner and the coarse detectors to verify the beam location. |
| − | #* (High) Insert a convertor in the PS and leave running with its own trigger throughout the run period. | + | #* (High) (HallD) Insert a convertor in the PS and leave running with its own trigger throughout the run period. |
| − | #* (Moderate) Calibrate the active collimator by moving the collimator slide. | + | #* (Moderate) (HallD, Accel.) Calibrate the active collimator by moving the collimator slide. |
| − | #* (Low) Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target. | + | #* (Low) (HallD) Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target. |
| − | #* (High) Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels. | + | #* (High) (HallD) Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels. |
| − | #* (High)Insert a thin target at the nominal target position. Set the regular trigger and take data for about 1 shift. | + | #* (High)(HallD) Insert a thin target at the nominal target position. Set the regular trigger and take data for about 1 shift. |
==[[One Week Pause in Running]]== | ==[[One Week Pause in Running]]== | ||
Revision as of 12:18, 2 July 2014
Contents
Main Page
Tune Electron Beam
Tune Photon Beam
- Goal: Tune the photon beam to go through the collimator, the experimental target area, and into the photon beam dump.
- Responsibility: HallD, Accelerator, RadCon.
- Priority: Most activities are High, but includes Moderate and Low priority activities.
- Conditions:
- Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics.
- Beam 50nA CW (if possible).
- Radiator 10-4 RL.
- Collimator hole is 3.5mm at nominal beam position.
- Solenoid on with current ~1000A.
- GlueX detectors off (except peripheral such as BCAL)
- No target in place (use air along beamline as target).
- Activities
- (High) (Accel., HallD) Use the beam profiler to move the photon beam to the hole in the collimator.
- (High) (RadCon) Check radiation levels in the collimator cave and HallD.
- (High) (HallD) Turn the PS magnet on and install a 10-3 converter. Tune the PS coarse detectors.
- (High) (HallD) Use the PS wire scanner and the coarse detectors to verify the beam location.
- (High) (HallD) Insert a convertor in the PS and leave running with its own trigger throughout the run period.
- (Moderate) (HallD, Accel.) Calibrate the active collimator by moving the collimator slide.
- (Low) (HallD) Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target.
- (High) (HallD) Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels.
- (High)(HallD) Insert a thin target at the nominal target position. Set the regular trigger and take data for about 1 shift.
