Difference between revisions of "Tune Electron Beam"

Revision as of 09:36, 8 August 2014

Goal: provide a clean electron beam through the center of the beam aperture to the beam dump in the tagger hall with acceptable radiation levels.
Priority: High
Link to the accelerator test plan for electron beam commissioning (ATLIS)
Expected duration Sept 29 - Oct 3 2014
Prerequisites:

Tagger microscope (TAGM) and all the crates with electronics should be removed from Hall D.
Goniometer in the beam-open position. The goniometer will not be used during the 2014 run
Amorphous radiator ladder equipped (HAPR included) and operational
Beam lines under vacuum
Tagger magnet operational
Shielding walls installed
Radiation monitors installed and operational
Collimator block in the position between two holes, shielding the central area of the beam pipe
Profiler counter installed in front of the collimator

Pulsed beam pulsed beam 4-10 µA (average 60-150 nA) for the beam tune
CW beam 50-100 nA at the final stage of the procedure
No radiator
Hall D quadrupole magnet MQPAD00 turned off
Hall D/Tagger Hall locked
No shift workers in Hall D; experts from Hall D are involved with the radiation measurements

Tune the pulsed beam to the dump, check the beam specifications, send the CW beam (accelerator).
Check radiation levels in the tagger hall (Hall D/RadCon).
Check for photons (with the Profiler and Active Collimator) and radiation levels in the collimator cave (Hall D/RadCon).

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 ==[[Fall 2014 Commissioning Plan#Tune Electron Beam|Main Page]]==
-==Tune Electron Beam==
 ==Tune Electron Beam==
 * Goal: provide a clean electron beam through the center of the beam aperture to the beam dump in the tagger hall with acceptable radiation levels.