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Effect of sheared toroidal flow on the equilibrium of an axisymmetric plasma torus

A K Agarwal, S N Bhattacharyya, A Sen1992年Plasma Physics and Controlled FusionIF 2.2出版社

Several present day Tokamak experiments have reported large plasma rotations (of the order of sound speed) induced by neutral beam injection during auxiliary heating. The measured rotation profiles indicate that velocity shear can be significant. The authors examine the effect of such sheared flows on the equilibrium of Tokamak plasmas. Using the generalized MHD equilibrium equations for axisymmetric rotation and adopting a variational formulation, the authors carry out a detailed numerical investigation of the form of the magnetic surfaces and other equilibrium quantities as a function of the flow function profile. In certain limits they also obtain analytic expressions for the ellipticity and finite shift of the magnetic axis.

日本語訳

近年のトカマク実験では、補助加熱中の中性粒子ビーム入射によって誘起される大きなプラズマ回転(音速のオーダー)が報告されている。測定された回転分布は、速度シアーが有意であることを示している。著者らは、このようなシアー流がトカマクプラズマの平衡に及ぼす影響を調べている。軸対称回転に対する一般化されたMHD平衡方程式を用い、変分定式化を採用して、磁気面の形状およびその他の平衡量が流れ関数分布の関数としてどう変化するかを詳細に数値計算により調べている。特定の極限では、磁気軸の楕円率と有限シフトに対する解析的表現も得ている。

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