H− enhancement process in a multicusp ion source operated with a barium insert structure

K. N. Leung, C. F. A. van Os, W. B. Kunkel

doi:10.1063/1.105199

H− enhancement process in a multicusp ion source operated with a barium insert structure

DOI PDF 被引用文献2件

K. N. Leung

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
C. F. A. van Os

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
W. B. Kunkel

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

説明

<jats:p>It has been demonstrated that the H− output current from a small multicusp source can be substantially enhanced if the hydrogen plasma is seeded with barium. Operating with a barium washer insert at the extraction aperture, it is found that the extractable H− current is increased by a factor of 3 if the insert bias potential is optimized. By use of a mixture of xenon and hydrogen gas, it is further demonstrated that the positive hydrogen ions are responsible for the observed H− enhancement.</jats:p>