An approximate analytic expression for neoclassical toroidal plasma viscosity in tokamaks

被引：103

作者：

Shaing, K. C. ^{[1
,2
,3
]}

Sabbagh, S. A. ^{[4
]}

Chu, M. S. ^{[5
]}

机构：

[1] Natl Cheng Kung Univ, Plasma & Space Sci Ctr, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan

[3] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

[4] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[5] Gen Atom Co, San Diego, CA 92185 USA

来源：

NUCLEAR FUSION | 2010年 / 50卷 / 02期

关键词：

RADIAL ELECTRIC-FIELD; MOMENTUM DISSIPATION; TRANSPORT; CONFINEMENT; STELLARATOR; TRANSITION; DIFFUSION; SYSTEMS; FLOWS;

D O I：

10.1088/0029-5515/50/2/025022

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：

An approximate analytic expression for neoclassical toroidal plasma viscosity in tokamaks that have error fields or magnetohydrodynamic activities is presented. The expression smoothly joins transport fluxes or plasma viscosity in all the known collisionality regimes derived from the solution of the bounce averaged drift kinetic equation and should be useful in modelling results of existing and future tokamak experiments. It also incorporates some of the extensions of the known expressions to include the effects of finite del B drift in the non-resonant transport processes. Here, B is the magnitude of the magnetic field. The toroidal momentum balance equation is a nonlinear function of the radial electric field when the neoclassical plasma viscosity is dominant. It can have bifurcated solutions for the radial electric field and may lead to better plasma confinement as a result.

引用

页数：12

共 50 条

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