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Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces

E A Belli, J Candy2015年Plasma Physics and Controlled FusionIF 2.2出版社

The capability to treat nonaxisymmetric flux surface geometry has been added to the drift-kinetic code NEO (Belli and Candy 2008 Plasma Phys. Control. Fusion50 095010). Geometric quantities (i.e. metric elements) are supplied by a recently-developed local 3D equilibrium solver, allowing neoclassical transport coefficients to be systematically computed while varying the 3D plasma shape in a simple and intuitive manner. Code verification is accomplished via detailed comparison with 3D Pfirsch–Schlüter theory. A discussion of the various collisionality regimes associated with 3D transport is given, with an emphasis on non-ambipolar particle flux, neoclassical toroidal viscosity, energy flux and bootstrap current. Finally, we compute the transport in the presence of ripple-type perturbations in a DIII-D-like H-mode edge plasma.

日本語訳

ドリフト運動論コードNEO(Belli and Candy 2008 Plasma Phys. Control. Fusion 50 095010)に、非軸対称磁気面形状を扱う機能が追加された。幾何量(すなわち計量要素)は、最近開発された局所3次元平衡ソルバーによって供給され、これにより3次元プラズマ形状を系統的かつ直感的に変化させながら新古典輸送係数を計算することが可能となった。コードの検証は、3次元Pfirsch–Schlüter理論との詳細な比較によって達成された。3次元輸送に関連する様々な衝突領域の議論が行われ、特に非両極性粒子束、新古典トロイダル粘性、エネルギー束、およびブートストラップ電流に焦点が当てられた。最後に、DIII-D類似のHモード周辺プラズマにおけるリップル型摂動の存在下での輸送計算が示された。

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diii-d中精度(概要文一致)

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Neoclassical transport
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