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Two-fluid magnetic island dynamics in slab geometry: Determination of the island phase velocity

机译:平板几何中的双流体磁岛动力学:岛相速度的确定

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摘要

The physics which determines the phase-velocity of a comparatively wide, isolated, magnetic island, formed as a result of a nonlinear tearing instability in a magnetic confinement device relying on the existence of nested magnetic flux surfaces, is investigated using a two-fluid model in slab geometry. It is found that the phase velocity is fixed by momentum transport across the magnetic flux surfaces in the region immediately surrounding the magnetic separatrix. Analytic predictions for the phase velocity are obtained, and are successfully benchmarked against the results of two-dimensional, drift-magnetohydrodynamical simulations. (c) 2005 American Institute of Physics.
机译:使用双流体模型研究了确定相对较宽的孤立磁岛的相速度的物理原理,该孤岛是由依赖于嵌套磁通量表面存在的磁约束装置中的非线性撕裂不稳定性而形成的在平板几何中。已经发现,相速度是由动量在整个磁分离线周围的区域中通过磁通量表面的动量传递所固定的。获得了相速度的解析预测,并成功地将其与二维漂移磁流体动力学模拟的结果进行了基准对比。 (c)2005年美国物理研究所。

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