Analysis of plasma distribution near the extraction region in surface produced negative ion sources

A. Fukano, A. Hatayama

Research output: Contribution to journalReview article

2 Citations (Scopus)


In study of a negative ion source, it is important to understand the plasma characteristics near the extraction region. A recent experiment in the NIFS-R&D ion source has suggested that a "double ion plasma layer" which is a region consisting of hydrogen positive and negative ions exists near the plasma grid (PG). Density distribution of plasma near the extraction region is studied analytically. It is shown that the density distribution depends on an amount of the surface produced negative ions and the double ion plasma layer is formed near the PG surface for the case of strong surface production.

Original languageEnglish
Article number4850696
JournalReview of Scientific Instruments
Issue number2
Publication statusPublished - 2014 Feb 1


ASJC Scopus subject areas

  • Instrumentation

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