反常输运与非线性自持磁岛的自洽分析

SELF CONSISTENT ANALYSIS OF ANOMALOUS TRANSPORT AND NONLINEAR SELF SUSTAINING MAGNETIC ISLANDS

从沿磁力线的等离子体电流与粒子径向输运相关的新经典ＭＨＤ型的广义欧姆定律出发，提出了分析反常输运与非线性自持磁岛的自洽理论模型，基于该模型导出了反常扩散系数及反常电子热导。结果表明，非线性磁岛链可由磁岛调制的反常输运维持，反过来又通过磁岛短路效应维持反常输运。

A self consistent theoretical model is proposed for analysis of the anomalous transport and nonlinear self sustaining magnetic islands, and on this basis, the anomalous diffusion coefficient and anomalous electron thermal conductivity are derived. The basic starting point is a generalized Ohms law of neoclassical MHD type which connects the parallel plasma current directly with the particle radial transport. The nonlinear magnetic island chains are shown to be sustained by the magnetic island modulated anomalous radial transport and the anomalous transport is sustained through the magnetic island “short circuit” effect.