Tune Photon Beam

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Tune Electron Beam

Tune Photon Beam

  1. Goal: Tune the photon beam to go through the collimator, the experimental target area, and into the photon beam dump.
  2. Responsibility: HallD, Accelerator, RadCon.
  3. Priority: Most activities are High, but includes Moderate and Low priority activities.
  4. Conditions:
    • Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics.
    • Beam 50nA CW (if possible).
    • Radiator 3.4·10-4 RL.
    • The 5mm collimator hole is 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).
  5. 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.

One Week Pause in Running

Collect Beam Data for Detector Checkout

Optimize Detector Settings

Drift Chamber Alignment

Collect More Regular Data