Excitation of high n toroidicity-induced Alfvén eigenmodes and associated plasma dynamical behaviour in the JT-60U ICRF experiments

H. Kimura, M. Saigusa, S. Moriyama, T. Kondoh, Y. Neyatani, T. Ozeki, T. Nishitani, Y. Kusama, T. Fujii, M. Sato, M. Memoto, K. Tobita, C. Z. Cheng

研究成果: Article査読

34 被引用数 (Scopus)

抄録

High frequency MHD activities observed during second harmonic ICRF heating are identified to be toroidicity-induced Alfvén eigenmodes (TAE) driven by MeV protons produced by ICRF heating. Correlation between MeV protons and TAE modes is clearly observed. TAE mode amplitude increases exponentially with increasing toroidal mode number up to more than ten. The tendency cannot be explained by present local TAE stability theories. Long suppression of TAE modes after a giant sawtooth crash can be explained by fast ion loss due to the sawtooth crash and evolving q-profile.

本文言語English
ページ(範囲)86-92
ページ数7
ジャーナルPhysics Letters A
199
1-2
DOI
出版ステータスPublished - 1995 3 20
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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