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Fokker–Planck studies of high power electron cyclotron heating in tokamaks

M.R. O'Brien, M. Cox, D.F.H. Start1986年被引用 40Nuclear FusionIF 3出版社

A Fokker–Planck formalism has been developed to interpret experimental data from high power electron cyclotron heating of tokamak plasmas in which the electron distribution function can be substantially distorted. The Fokker–Planck equation is solved using a 2-D code which incorporates electron trapping, a steady Ohmic electric field and a bounce averaged electron cyclotron heating term. The quasilinear RF diffusion coefficient is calculated using a single particle model which includes the mildly relativistic resonance condition and takes into account localized RF power injection and tokamak rotational transform effects. Comparisons are presented of the calculated and observed soft X-ray spectra from 60 GHz second harmonic electron cyclotron heating experiments on the CLEO tokamak. Good agreement between theory and experiment is found. In addition, predicted RF current drive efficiencies for the COMPASS tokamak are presented.

日本語訳

フォッカー=プランク形式を用いて、トカマクプラズマの電子サイクロトロン加熱における高パワー実験データを解釈する手法を開発した。この場合、電子分布関数は大幅に歪む可能性がある。フォッカー=プランク方程式は、電子の捕捉、定常オーミック電場、およびバウンス平均化された電子サイクロトロン加熱項を組み込んだ2次元コードを用いて解かれる。準線形RF拡散係数は、弱相対論的共鳴条件を含み、局所的なRFパワー注入とトカマク回転変換効果を考慮した単一粒子モデルを用いて計算される。CLEOトカマクにおける60GHzの第2高調波電子サイクロトロン加熱実験から得られた軟X線スペクトルと計算結果の比較が示される。理論と実験の間には良好な一致が見られる。さらに、COMPASSトカマクにおける予測RF電流駆動効率が提示される。

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