A quiver kinetic formulation and evaluation of fluxes in the long mean-free path limit
A quiver kinetic formulation and evaluation of fluxes in the long mean-free path limit
复制标题
长平均自由程极限中的颤动动力学公式和通量评估
DOI：
10.1063/1.859505
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
J. Myra
中科院分区：
文献类型：
--
作者：
P. Catto;J. Myra
施加的强射频（rf）场可以使一种或多种带电粒子以与其热速度相当的振动速度振荡。当碰撞非共振波粒过程在无碰撞共振相互作用中占主导地位时，颤振动力学形式[物理学]。流体[B] 1,1193(1989)]可以使用。本文研究了射频加热托卡马克边缘等离子体中的强波场满足这些条件。在此基础上扩展了以往的工作，允许在长平均自由程极限下对最后一个封闭通量面附近的粒子通量进行评估。发现了两种类型的对流通量，一种是强场区域的局部对流通量，另一种是非局部对流通量。在快波离子回旋加速器加热的一个简单的说明性模型中，表明电子的磁化通量（局部的）是主要的对流通量。
Intense, applied radio frequency (rf) fields can cause one or more charged particle species to oscillate with a quiver speed comparable to its thermal speed. When collisional nonresonant wave particle processes dominate over collisionless resonant interactions, the quiver kinetic formalism [Phys. Fluids B 1, 1193 (1989)] may be employed. The intense wave fields in the edge plasma of an rf heated tokamak satisfy these criteria and are investigated in this paper. Previous work is extended to permit an evaluation of particle fluxes near the last closed flux surface in the long mean‐free path limit. Two types of convective fluxes are found, one local to the region of intense fields and one nonlocal. The magnetization flux of electrons (which is local) is shown to be the dominant convective flux in a simple illustrative model for the case of fast wave ion cyclotron heating.