Frequency spectrum of fluctuations near a rational surface in a toroidal heliac

Tatsuya Zama, Sumio Kitajima, Masakazu Takayama, Nobunao Takeuchi, Hiroshige Watanabe

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Density and space potential fluctuations have been studied in electron cyclotron resonance heating (ECRH) plasma of a helical axis stellarator TU Heliac using Langmuir probe techniques. These fluctuations are coherent and global, which can be explained by a drift instability model in cylindrical geometry. A particular fluctuation mode vanishes inside a rational surface. The ratio of this mode, n/m, corresponds to the rotational transform Ƙ of this rational surface, (m, n: poloidal, toroidal fluctuation modes, respectively). This phenomenon near the rational surface can also be explained by a drift instability theory.

本文言語English
ページ(範囲)L349-L352
ジャーナルJapanese journal of applied physics
32
3 A
DOI
出版ステータスPublished - 1993 3

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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