"Geometrical Effects of the Magnetic Field on the Neoclassical Flow, Current and Rotation in General Toroidal Systems"
"Geometrical Effects of the Magnetic Field on the Neoclassical Flow, Current and Rotation in General Toroidal Systems"
复制标题
“磁场对一般环形系统中新古典流动、电流和旋转的几何效应”
DOI：
10.1143/jpsj.61.833
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
M. Okamoto
中科院分区：
文献类型：
--
作者：
N. Nakajima;M. Okamoto
将平行流动、电流和旋转的新经典理论推广到一般环形系统中的多组分等离子体。推广的理论是在布泽尔坐标系中构造的，在几何因子方面对所有碰撞(1/ν、平台、普菲尔什-施卢特体系)是通用的。结果表明，轴对称环面系统与非轴对称环面系统的主要区别在于反映轴对称破坏的几何因素。结果发现，径向电场直接驱动的新古典主义电流在非轴对称器件中可以存在，而在轴对称环面中这种电流则消失。首先推导了非轴对称环形系统中多组分等离子体的极向旋转和环形旋转的显式表达式。在小几何因子的限制下，离子的极向旋转和环形旋转被简化为通常的反磁和E×B漂移。
Neoclassical theories for the parallel flow, current and rotation are extended to a multispecies plasma in general toroidal systems. The extended theory is constructed in the Boozer coordinate system to be common in all collisionalities (1/ν, plateau, Pfirsh-Schluter regime) in terms of the geometric factor. It is shown that the decisive difference between axisymmetric and non-axisymmetric toroidal systems is attributed to the geometric factor which reflects the breaking of axisymmetry. As a result it is first found that the neoclassical current driven directly by the radial electric field can exist in the non-axisymmetric device, whereas such the current vanishes in the axisymmetric torus. Explicit expressions for poloidal and toroidal rotations are first derived for a multispecies plasma in the non-axisymmetric toroidal system. In the limit of small geometric factor, the poloidal and toroidal rotations of ions are reduced to the usual diamagnetic and E × B drifts.