Numerical Investigation of Saturation Mechanism of the Dissipative Trapped Ion Instability

Akiyoshi Hatayama, Yuji Koshi, Masatada Ogasawara

研究成果: Article査読

2 被引用数 (Scopus)

抄録

A set of model equations of the dissipative trapped ion instability is derived and solved numerically. Multiple time scale expansion scheme is applied to the non-linear fluid equations of Kadomtsev and Pogutse by taking μ=ω⁄νe as a small parameter, where ω is the frequency of the wave and νe is the effective collision frequency of the electrons. All the modes except for the linearly most unstable one die away due to the mode coupling. Final saturation of the mode is attributed to the modification of background trapped ion number density averaged over the poloidal direction. The coefficient of trapped ion anomalous diffusion, which scales as D∝νia2i is the effective collision frequency of the ions and a is the minor radius of a torus) is also derived.

本文言語English
ページ(範囲)3701-3708
ページ数8
ジャーナルJournal of the Physical Society of Japan
50
11
DOI
出版ステータスPublished - 1981

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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