Neoclassical transport in toroidal plasmas with nonaxisymmetric flux surfaces

被引：12
|
作者：
Belli, E. A. [1 ]
Candy, J. [1 ]
机构：
[1] Gen Atom, San Diego, CA 92186 USA
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2015年 / 57卷 / 05期
关键词：
neoclassical transport; toroidal plasmas; nonaxisymmetric; drift-kinetic; COEFFICIENTS; EQUATION;
D O I：
10.1088/0741-3335/57/5/054012
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The capability to treat nonaxisymmetric flux surface geometry has been added to the drift-kinetic code NEO (Belli and Candy 2008 Plasma Phys. Control. Fusion 50 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-Schlter 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.
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页数：11
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