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Analysis of second harmonic ICRF waves in NBI heated JT-60 plasmas

K. Hamamatsu, M. Azumi, Y. Kishimoto, A. Fukuyama, S.-I. Itoh, K. Itoh1989年被引用 15Nuclear FusionIF 3出版社

The propagation and absorption of second harmonic ion cyclotron range of frequency (ICRF) waves in NBI heated plasmas are investigated for the regime of plasma parameters in JT-60. The quasi-linear diffusion in the velocity space of ions is taken into account. The Fokker-Planck equation and the kinetic wave equation are numerically solved to obtain the spatial profile of the velocity distribution function and the power deposition profile in a self-consistent manner. The calculation of the power partition rate includes two processes: the direct absorption of the wave through wave-particle interactions and the power transfer due to Coulomb collisions. The power partition between electrons and ions is strongly affected by the plasma density and the RF power. The plasma temperature and the NBI power have some influence on power partition and tail formation in the experimental conditions of interest. The acceleration of the injected particles by ICRF heating is studied. The tail temperature, which is defined by the gradient of the velocity distribution function of tail ions, and the total stored energy of the plasma are calculated and the dependence on the plasma parameters is analysed.

日本語訳

NBI加熱プラズマにおける第2高調波イオンサイクロトロン周波数帯(ICRF)波の伝播と吸収を、JT-60のプラズマパラメータ領域に対して調べた。イオンの速度空間における準線形拡散を考慮した。フォッカー・プランク方程式と波動の運動論的方程式を数値的に解くことにより、速度分布関数の空間分布とパワー堆積分布を自己無撞着に求めた。パワー配分率の計算には、波動-粒子相互作用による直接吸収とクーロン衝突によるパワー輸送の2つの過程を含めた。電子とイオン間のパワー配分は、プラズマ密度とRFパワーに強く影響される。プラズマ温度とNBIパワーは、対象とする実験条件においてパワー配分とテール形成にある程度の影響を及ぼす。ICRF加熱による入射粒子の加速を調べた。テールイオンの速度分布関数の勾配によって定義されるテール温度と、プラズマの全蓄積エネルギーを計算し、プラズマパラメータへの依存性を解析した。

装置

jt-60sa高精度(タイトル一致)

wiki

Ion cyclotron heatingNeutral beam injectionJT-60
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