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Extension of neoclassical rotation theory for tokamaks to realistically account for the geometry of magnetic flux surfaces

C. Bae, W.M. Stacey, W.M. Solomon2013年被引用 25Nuclear FusionIF 3出版社

A neoclassical rotation theory (poloidal and toroidal) is developed from the fluid moment equations, using the Braginskii decomposition of the viscosity tensor extended to generalized curvilinear geometry and a neoclassical calculation of the parallel viscosity coefficient interpolated over collision regimes. Important poloidal dependences are calculated using the Miller equilibrium flux surface geometry representation, which takes into account elongation, triangularity, flux surface compression/expansion and the Shafranov shift. The resulting set of eight (for a two-ion-species plasma model) coupled nonlinear equations for the flux surface averaged poloidal and toroidal rotation velocities and for the up–down and in–out density asymmetries for both ion species are solved numerically. Comparison of prediction with measured carbon poloidal and toroidal rotation velocities in a co-injected and a counter-injected H-mode discharge in DIII-D (Luxon J. 2002 Nucl. Fusion42 614) indicates agreement to within <10% except in the very edge (ρ > 0.90) in the co-injected discharge.

日本語訳

新古典回転理論(ポロイダルおよびトロイダル)が流体モーメント方程式から展開される。そこでは、一般化曲線座標幾何学に拡張された粘性テンソルのブラギンスキー分解と、衝突領域にわたって補間された平行粘性係数の新古典計算が用いられる。重要なポロイダル依存性は、伸長度、三角変形度、フラックス面圧縮/膨張、およびシャフラノフシフトを考慮したミラー平衡フラックス面幾何学表現を用いて計算される。得られた、フラックス面平均ポロイダルおよびトロイダル回転速度と、両イオン種の上下および内外の密度非対称性に関する8つの連成非線形方程式(2イオン種プラズマモデルに対するもの)は、数値的に解かれる。DIII-D (Luxon J. 2002 Nucl. Fusion42 614) における同方向入射および逆方向入射Hモード放電で測定された炭素のポロイダルおよびトロイダル回転速度との予測の比較は、同方向入射放電の非常に端部(ρ > 0.90)を除いて10%以内の一致を示す。

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diii-d中精度(概要文一致)
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