Development of a high current H(-) ion source for cyclotrons

A multi-cusp DC H(-) ion source has been designed and fabricated for medical applications of cyclotrons. Optimization of the ion source is in progress, such as the improvement of the filament configuration, magnetic filter strength, extraction electrode's shape, configuration of electron suppre...

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Published inReview of scientific instruments Vol. 85; no. 2; p. 02B107
Main Authors Etoh, H, Aoki, Y, Mitsubori, H, Arakawa, Y, Mitsumoto, T, Yajima, S, Sakuraba, J, Kato, T, Okumura, Y
Format Journal Article
LanguageEnglish
Published United States 01.02.2014
Subjects
Cesium
Cyclotrons - instrumentation
Hydrogen
Magnets
Temperature
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Summary:A multi-cusp DC H(-) ion source has been designed and fabricated for medical applications of cyclotrons. Optimization of the ion source is in progress, such as the improvement of the filament configuration, magnetic filter strength, extraction electrode's shape, configuration of electron suppression magnets, and plasma electrode material. A small quantity of Cs has been introduced into the ion source to enhance the negative ion beam current. The ion source produced 16 mA of DC H(-) ion beam with the Cs-seeded operation at a low arc discharge power of 2.8 kW.
ISSN:1089-7623
DOI:10.1063/1.4827577