Difference between revisions of "Tune Photon Beam"
From Hall D Ops Wiki
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# Goal: Tune the photon beam to go through the collimator, the experimental target area, and into the photon beam dump. | # Goal: Tune the photon beam to go through the collimator, the experimental target area, and into the photon beam dump. | ||
# Responsibility: HallD, Accelerator, RadCon. | # Responsibility: HallD, Accelerator, RadCon. | ||
| − | + | # Priority: Most activities are High, but includes Moderate and Low priority activities. | |
| − | # Priority: | + | |
# Conditions: | # Conditions: | ||
#* Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics. | #* Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics. | ||
| Line 17: | Line 16: | ||
#* No target in place (use air along beamline as target). | #* No target in place (use air along beamline as target). | ||
# Activities | # Activities | ||
| − | #* Use the beam profiler to move the photon beam to the hole in the collimator. (Accel, Hall D) | + | #* (High) Use the beam profiler to move the photon beam to the hole in the collimator. (Accel, Hall D) |
| − | #* Check radiation levels in the collimator cave and HallD. (RadCon) | + | #* (High) Check radiation levels in the collimator cave and HallD. (RadCon) |
| − | #* Turn the PS magnet on and install a 10<sup>-3</sup> converter. Tune the PS coarse detectors (Hall D). | + | #* (High) Turn the PS magnet on and install a 10<sup>-3</sup> converter. Tune the PS coarse detectors (Hall D). |
| − | #* Use the PS wire scanner and the coarse detectors to verify the beam location. | + | #* (High) Use the PS wire scanner and the coarse detectors to verify the beam location. |
| − | #* Insert a convertor in the PS and leave running with its own trigger throughout the run period. | + | #* (High) Insert a convertor in the PS and leave running with its own trigger throughout the run period. |
| − | #* Calibrate the active collimator by moving the collimator slide | + | #* (Moderate) Calibrate the active collimator by moving the collimator slide. (HallD and Accelerator) |
| − | #* Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target | + | #* (Low) Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target. (Hall D) |
| − | #* Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels. (Hall D) | + | #* (High) Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels. (Hall D) |
| − | #* Insert a thin target at the nominal target position. Set the regular trigger and take data for about 1 shift. | + | #* (High)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 12:15, 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) Use the beam profiler to move the photon beam to the hole in the collimator. (Accel, Hall D)
- (High) Check radiation levels in the collimator cave and HallD. (RadCon)
- (High) Turn the PS magnet on and install a 10-3 converter. Tune the PS coarse detectors (Hall D).
- (High) 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.
- (Moderate) Calibrate the active collimator by moving the collimator slide. (HallD and Accelerator)
- (Low) Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target. (Hall D)
- (High) Turn detectors on slowly, moving in from the peripheral to the center. Monitor the rates and background levels. (Hall D)
- (High)Insert a thin target at the nominal target position. Set the regular trigger and take data for about 1 shift.
