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- K. N. Leung
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
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- K. W. Ehlers
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
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- M. Bacal
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
抄録
<jats:p>H− ions formed by volume processes are extracted from a multicusp ion source. It is shown that a permanent magnet filter together with a small positive bias voltage on the plasma grid can produce a very significant reduction in electron drain as well as a sizable increase in H− ions available for extraction. A further reduction in electron current is achieved by installing a pair of ceramic magnets at the extraction aperture. The combined arrangement improves the ratio of extracted H− ion current to electron current to about unity.</jats:p>
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 54 (1), 56-61, 1983-01-01
AIP Publishing