Study of plasma meniscus and beam halo in negative ion sources using three dimension in real space and three dimension in velocity space particle in cell model

S. Nishioka, K. Miyamoto, S. Okuda, I. Goto, A. Hatayama, A. Fukano

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Our previous study by two dimension in real space and three dimension in velocity space-particle in cell model shows that the curvature of the plasma meniscus causes the beam halo in the negative ion sources. The negative ions extracted from the periphery of the meniscus are over-focused in the extractor due to the electrostatic lens effect, and consequently become the beam halo. The purpose of this study is to verify this mechanism with the full 3D model. It is shown that the above mechanism is essentially unchanged even in the 3D model, while the fraction of the beam halo is significantly reduced to 6%. This value reasonably agrees with the experimental result.

本文言語English
論文番号02A737
ジャーナルReview of Scientific Instruments
85
2
DOI
出版ステータスPublished - 2014 2

ASJC Scopus subject areas

  • Instrumentation

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