Development of a 130-mA, 75-kV high voltage column for high-intensity dc proton injectors

A reliable high-voltage (HV) column has been developed for dc proton injectors with applications to high-intensity cw linacs. The HV column is coupled with a microwave-driven plasma generator to produce a 75-keV, 110-mA dc proton beam. Typical proton fraction from this source is 85%–90%, requiring t...

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Published in:Review of Scientific Instruments 1998-02, Vol.69 (2), p.1017-1019
Main Authors: Sherman, Joseph, Arvin, Andrew, Hansborough, Lash, Hodgkins, Dave, Meyer, Earl, Schneider, J. David, Stevens, R. R., Thuot, Michael, Zaugg, Thomas
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description A reliable high-voltage (HV) column has been developed for dc proton injectors with applications to high-intensity cw linacs. The HV column is coupled with a microwave-driven plasma generator to produce a 75-keV, 110-mA dc proton beam. Typical proton fraction from this source is 85%–90%, requiring the HV column and accelerating electrodes to operate with a 130-mA hydrogen-ion beam current. A glow-discharge, which was caused by the ion source axial magnetic field, was initially observed in the HV column. This problem was solved by scaling the electron production processes, the magnetic field, and the HV column pressure into a favorable regime. A subsequent 168 h reliability run on the 75-keV injector showed that the ion source (plasma generator and HV column) has >98% beam availability.
doi_str_mv 10.1063/1.1148707
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title Development of a 130-mA, 75-kV high voltage column for high-intensity dc proton injectors
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