Tune Electron Beam

From Hall D Ops Wiki
Jump to: navigation, search
  1. 4 days: Tune beam to Hall D line dumplette (Tagger Hall can remain open).
  2. 3 days: Tune beam to Tagger Hall D (Tagger Hall and Hall D must be closed).
  • Prerequisites:
  1. Tagger microscope (TAGM) and all the crates with electronics removed from Hall D.
  2. Goniometer in the beam-open position. The goniometer will not be used during the 2014 run.
  3. Amorphous radiator ladder equipped and operational
    • Responsibility: Hovanes Egiyan.
  4. Beam lines under vacuum
  5. Tagger magnet operational
    • Responsibility: MCC
  6. Shielding walls installed
  7. Radiation monitors installed and operational
  8. Upstream Profiler installed in front of the collimator
  9. Downstream Profiler installed in front of photon beam dump
  • Conditions:
  1. Pulsed beam pulsed beam 4-10 µA (average 60-150 nA) for the beam tune
  2. CW beam 50-100 nA at the final stage of the procedure
  3. Primary collimator block in the position between two holes, shielding the central area of the beam pipe . Secondary collimator removed.
  4. Vacuum window covers removed (7 window covers)
  5. No radiator inserted.
  6. No shift workers in Hall D except if needed. RC and/or other Hall D personnel follows the beam tuning procedure at the MCC.

Back to main Fall14 commissioning page