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

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36 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)86-92
頁數7
期刊Physics Letters A
199
發行號1-2
DOIs
出版狀態Published - 1995 3月 20

All Science Journal Classification (ASJC) codes

  • 一般物理與天文學

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