Study of the negative ion extraction mechanism from a double-ion plasma in negative ion sources

I. Goto, K. Miyamoto, S. Nishioka, Akiyoshi Hatayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We have developed a 2D3V-PIC model of the extraction region, aiming to clarify the basic extraction mechanism of H - ions from the double-ion plasma in H - negative ion sources. The result shows the same tendency of the H - ion density nH - as that observed in the experiments, i.e.,nH - in the upstream region away from the plasma meniscus (H - emitting surface) has been reduced by applying the extraction voltage. At the same time, relatively slow temporal oscillation of the electric potential compared with the electron plasma frequency has been observed in the extraction region. Results of the systematic study using a 1D3V-PIC model with the uniform magnetic field confirm the result that the electrostatic oscillation is identified to be lower hybrid wave. The effect of this oscillation on the H - transport will be studied in the future.

Original languageEnglish
Title of host publication4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014
EditorsWerner Kraus, Paul McNeely
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735412972
DOIs
Publication statusPublished - 2015 Apr 8
Event4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014 - Garching, Germany
Duration: 2014 Oct 62014 Oct 10

Publication series

NameAIP Conference Proceedings
Volume1655
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014
CountryGermany
CityGarching
Period14/10/614/10/10

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Goto, I., Miyamoto, K., Nishioka, S., & Hatayama, A. (2015). Study of the negative ion extraction mechanism from a double-ion plasma in negative ion sources. In W. Kraus, & P. McNeely (Eds.), 4th International Symposium on Negative Ions, Beams and Sources, NIBS 2014 [020011] (AIP Conference Proceedings; Vol. 1655). American Institute of Physics Inc.. https://doi.org/10.1063/1.4916420