Difference between revisions of "Tune Photon Beam"
From Hall D Ops Wiki
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==[[Fall 2014 Commissioning Plan|Main Page]]== | ==[[Fall 2014 Commissioning Plan|Main Page]]== | ||
==[[Tune Electron Beam]]== | ==[[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. | ||
| + | # Conditions: | ||
| + | #* Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics. | ||
| + | #* Beam 50nA CW (if possible). | ||
| + | #* Radiator 10<sup>-4</sup> 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 | ||
| + | #* 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) | ||
| + | #* Turn the PS magnet on and install a 10<sup>-3</sup> converter. Tune the PS coarse detectors (Hall D). | ||
| + | #* Use the PS coarse detectors to verify the beam location. | ||
| + | #* Insert a convertor in the PS and leave running with its own trigger throughout the run period. | ||
| + | #* Calibrate the active collimator by scanning (desirable activity). (HallD and Accelerator) | ||
| + | #* Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target (if time permits) (Hall D) | ||
| + | #* 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. | ||
==[[One Week Pause in Running]]== | ==[[One Week Pause in Running]]== | ||
==[[Collect Beam Data for Detector Checkout]]== | ==[[Collect Beam Data for Detector Checkout]]== | ||
Revision as of 10:46, 2 July 2014
Contents
[hide]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.
- 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
- 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)
- Turn the PS magnet on and install a 10-3 converter. Tune the PS coarse detectors (Hall D).
- Use the PS coarse detectors to verify the beam location.
- Insert a convertor in the PS and leave running with its own trigger throughout the run period.
- Calibrate the active collimator by scanning (desirable activity). (HallD and Accelerator)
- Use other detectors (under discussion) to verify the beam position with respect to the beam pipes and the target (if time permits) (Hall D)
- 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.
