Extraction of volume‐produced H−ions from a multicusp source
作者:
K. N. Leung,
K. W. Ehlers,
M. Bacal@f@f,
期刊:
Review of Scientific Instruments
(AIP Available online 1983)
卷期:
Volume 54,
issue 1
页码: 56-61
ISSN:0034-6748
年代: 1983
DOI:10.1063/1.1137215
出版商: AIP
数据来源: AIP
摘要:
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.
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