Theory of isolated, small-scale magnetic islands in a high temperature tokamak plasma
Theory of isolated, small-scale magnetic islands in a high temperature tokamak plasma
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高温托卡马克等离子体中孤立的小尺度磁岛理论
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发表时间：
1995
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通讯作者：
H. Wilson
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文献类型：
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作者：
J. Connor;H. Wilson
本文提出了高温托卡马克等离子体中存在无相互作用的小尺度“漂移”磁岛的理论。这种情况与Rebut和Hugon [Plasma Phys. Controlled Fusion 33，1085（1991）]讨论的情况形成对比，后者涉及由岛重叠引起的磁湍流的背景“海”。这些岛是由有限离子拉莫尔半径对粒子漂移的影响驱动的，它们以与抗磁速度相当的速度传播。与Szakov的工作[Plasma Phys. Controlled Fusion 35，657（1993）]相反，碰撞被认为是罕见的。虽然在这里讨论的模型中，饱和岛的大小与碰撞频率无关，但碰撞在确定磁岛的频率方面起着至关重要的作用。的估计是由与这些磁岛的静电势的波动的结果的异常热输运。预测的热扩散率有几个，但...
A theory for the existence of noninteracting small‐scale, ‘‘drift’’ magnetic islands in a high temperature tokamak plasma is presented. This situation contrasts with that discussed by Rebut and Hugon [Plasma Phys. Controlled Fusion 33, 1085 (1991)] which involves a background ‘‘sea’’ of magnetic turbulence caused by island overlap. The islands are driven by the effect of finite ion Larmor radius on the particle drifts and they propagate with a velocity comparable to the diamagnetic velocity. In contrast with the work of Smolyakov [Plasma Phys. Controlled Fusion 35, 657 (1993)] collisions are assumed to be rare. Although the saturated island size is independent of the collision frequency in the model discussed here, collisions play a crucial role in determining the frequency of the magnetic islands. An estimate is made of the anomalous heat transport which results from the fluctuations in the electrostatic potential associated with these magnetic islands. The predicted thermal diffusivity has several, but ...