TY - JOUR
T1 - Excitation of high n toroidicity-induced Alfvén eigenmodes and associated plasma dynamical behaviour in the JT-60U ICRF experiments
AU - Kimura, H.
AU - Saigusa, M.
AU - Moriyama, S.
AU - Kondoh, T.
AU - Neyatani, Y.
AU - Ozeki, T.
AU - Nishitani, T.
AU - Kusama, Y.
AU - Fujii, T.
AU - Sato, M.
AU - Memoto, M.
AU - Tobita, K.
AU - Cheng, C. Z.
PY - 1995/3/20
Y1 - 1995/3/20
N2 - 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.
AB - 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.
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U2 - 10.1016/0375-9601(95)00052-5
DO - 10.1016/0375-9601(95)00052-5
M3 - Article
AN - SCOPUS:0001832673
SN - 0375-9601
VL - 199
SP - 86
EP - 92
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -