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Studies of high frequency hot ion instabilities by means of correlation ECE on Tore Supra

V S Udintsev, M Goniche, G Giruzzi, G T A Huysmans, F Imbeaux, P Maget, X Garbet, R Sabot, J L Ségui, F Turco2006年Plasma Physics and Controlled FusionIF 2.2出版社

High frequency (>100 kHz) modes have been observed for the first time in combined LHCD and ICR-heated minority H (D) plasmas on Tore Supra by means of a correlation ECE diagnostic and by fluctuation reflectometers. These modes have been identified as the toroidicity-induced Alfvén eigenmodes (TAEs) that are destabilized by fast minority hydrogen ions with energies above 250 keV. In reversed central shear plasmas with non-linear oscillations of the central temperature, evolution of the TAE frequency is linked to the development of the local safety factor. This confirms that the central temperature and the q-profile evolve as a non-linearly coupled system in the so-called O-regime in Tore Supra.

日本語訳

高周波(>100 kHz)モードが、Tore SupraにおけるLHCDとICR加熱を組み合わせた少数派H(D)プラズマにおいて、相関ECE診断法と揺動反射計を用いて初めて観測された。これらのモードは、250 keVを超えるエネルギーを持つ高速少数派イオンによって不安定化されるトロイダル性誘起アルフヴェン固有モード(TAEs)として同定された。逆転中心シアープラズマにおいて、中心温度の非線形振動を伴い、TAE周波数の時間発展は局所安全係数の発展と関連している。これは、中心温度とqプロファイルが、Tore SupraにおけるいわゆるO領域において、非線形に結合したシステムとして時間発展することを確認するものである。

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Tore SupraElectron cyclotron emission
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