H− enhancement process in a multicusp ion source operated with a barium insert structure
- 8 April 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (14) , 1467-1469
- https://doi.org/10.1063/1.105199
Abstract
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.Keywords
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