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Turbulence studies in tokamak boundary plasmas with realistic divertor geometry

X.Q. Xu, R.H. Cohen, G.D. Porter, T.D. Rognlien, D.D. Ryutov, J.R. Myra, D.A. D'Ippolito, R.A. Moyer, R.J. Groebner2000年被引用 37Nuclear FusionIF 3出版社

Results are presented from the 3-D non-local electromagnetic turbulence code BOUT and the linearized shooting code BAL for studies of turbulence in tokamak boundary plasmas and its relationship to the L-H transition, in a realistic divertor plasma geometry. The key results include: (1) the identification of the dominant resistive X point mode in divertor geometry; (2) turbulence suppression in the L-H transition by shear in the E × B drift velocity, ion diamagnetism and finite polarization; (3) the fact that calculated values of the thermal diffusivities such as χi are comparable to those inferred from the experimentally measured plasma density and temperature profiles. On the basis of simulation results, a parameterization of the transport is given that includes the dependence on the relevant physical parameters.

日本語訳

現実的なダイバータプラズマ形状におけるトカマク境界プラズマ中の乱流と、そのL-H遷移との関係の研究のための、3-D非局所電磁乱流コードBOUTおよび線形化シューティングコードBALによる結果を提示する。主な結果は以下の通りである:(1) ダイバータ形状における支配的な抵抗性X点モードの同定;(2) E × Bドリフト速度のシア、イオン反磁性、および有限分極によるL-H遷移における乱流抑制;(3) χiなどの熱拡散係数の計算値が、実験的に測定されたプラズマ密度および温度分布から推定される値と同等であるという事実。シミュレーション結果に基づいて、関連する物理パラメータへの依存性を含む輸送のパラメータ化が与えられる。

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