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: ジャーナルへの寄稿学術論文査読

36 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.

本文言語英語
ページ(範囲)86-92
ページ数7
ジャーナルPhysics Letters, Section A: General, Atomic and Solid State Physics
199
1-2
DOI
出版ステータス出版済み - 1995 3月 20

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