Tune Photon Beam

From Hall D Ops Wiki
Revision as of 12:10, 2 July 2014 by Cmeyer (Talk | contribs) (Main Page)

Jump to: navigation, search

Main Page

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. Staffing:
  4. Priority:
  5. 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).
  6. 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 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.
    • 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

Collect Beam Data for Detector Checkout

Optimize Detector Settings

Drift Chamber Alignment

Collect More Regular Data