Fall 2014 Commissioning Plan

Tune Electron Beam

1. Goal: Get electron beam to the dump in the tagger hall.
2. Responsibility: Accelerator, HallD, RadCon.
3. Conditions:
   • Tagger hall equipment removed or shielded. This includes the microscope (TAGM) and the electronics.
   • Pulsed beam may be used.
   • No radiator installed.
   • Collimator blocks the photon beamline to Hall D.
4. Activities:
   • Tune beam to the dump, check the beam specification.
   • Check radiation levels in the tagger hall.
   • Check for photons and radiation levels in the collimator cave.

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. 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).
4. 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.

One Week Pause in Running

1. Goal: Reinstall tagger detectors and check data.
2. Responsibility: HallD
3. Conditions:
   • Beam off in the Hall.
4. Acivities
   • Reinstall the tagger detectors, TAGM and TAGH.
   • Check validity of data offline. Use as feedback to detector settings.
   • Check/modify the online monitoring histograms based on data.

Collect Beam Data for Detector Checkout

1. Goal: Collect 5 days of beam data.
2. Responsibility: HallD
3. Conditions:
   • Tagger hall equipment in place and operating.
   • Beam 50nA CW
   • Radiator is 10^-4.
   • Collimator hole is 3.5mm.
   • Solenoid on at 1200A
   • GlueX detectors are on.
   • Thin commissioning target at nominal position.
4. Activities
   • Verify photon beam position and background levels.
   • Take data with the regular trigger for five days

Optimize Detector Settings

1. Goal: Verify optimal settings for detectors.
2. Responsibility: HallD
3. Conditions:
   • Tagger hall equipment in place and operating.
   • Beam 50nA CW
   • Radiator is 10^-4.
   • Collimator hole is 3.5mm.
   • Solenoid on at 1200A
   • GlueX detectors are on.
   • Thin commissioning target at nominal position.
4. Activities
   • If time permits, dedicated running to optimize settings of detectors will be carried out.

Drift Chamber Alignment

1. Goal: Collect data with no or low field.
2. Responsibility: HallD
3. Conditions:
   • Tagger hall equipment in place and operating.
   • Beam 50nA CW
   • Radiator is 10^-4.
   • Collimator hole is 3.5mm.
   • Solenoid 0-300A depending on backgrounds.
   • GlueX detectors are on.
   • Thin commissioning target at various positions.
4. Activities
   • If time permits, collect data with target in several positions.