Zonal flows in toroidal systems
Zonal flows in toroidal systems
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环形系统中的层流
DOI：
10.1063/1.2751604
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发表时间：
2007
影响因子：
2.2
通讯作者：
A. Boozer
中科院分区：
文献类型：
--
作者：
H. Mynick;A. Boozer
本文用作用角理论分析了托卡马克和仿星器中纬向流的屏蔽和时间演化。这个框架允许一个解决的动力学方程，而不扩大该方程的径向偏移和时间尺度的小参数，从而在更一般的表达式的介电屏蔽，并与扩展的缩放从早期的工作。从这些表达式中，我们发现，对于每一种碰撞输运机制，都有一个相应的屏蔽机制，其形式和尺度密切相关。这些广义表达式的演变和大小的纬向流的效果，以及它们对仿星器设计的影响。
An analytic study of the shielding and time evolution of zonal flows in tokamaks and stellarators is presented, using the action-angle formalism. This framework permits one to solve the kinetic equation without expansion of that equation in small parameters of radial excursions and time scales, resulting in more general expressions for the dielectric shielding, and with a scaling extended from that in earlier work. From these expressions, it is found that for each mechanism of collisional transport, there is a corresponding shielding mechanism, of closely related form and scaling. The effect of these generalized expressions on the evolution and size of zonal flows, and their implications for stellarator design are considered.