Development of instabilities in wire-array Z pinches.
Development of instabilities in wire-array Z pinches.
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DOI：
10.1103/physrevlett.101.055005
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发表时间：
2007-11
影响因子：
8.6
通讯作者：
J. Chittenden;C. Jennings
中科院分区：
文献类型：
--
作者：
J. Chittenden;C. Jennings
三维电阻MHD模拟被用来显示线阵Z箍缩中调制烧蚀的“基本”模式的性质如何与修正的m=0类不稳定性的增长相一致。研究发现，调制波长、结构和演化受磁拓扑控制，并且在很大程度上与初始条件无关。微扰幅度随线数的变化与实验上的X射线功率标度一致。对螺旋线阵列的模拟表明，不稳定的幅度大大降低。
3D resistive MHD simulations are used to show how the properties of the "fundamental" mode of modulated ablation in wire-array Z pinches, are consistent with the growth of a modified m=0-like instability. The modulation wavelength, structure, and evolution is found to be governed by the magnetic topology and is largely independent of the initial conditions. The perturbation amplitude as a function of wire number is shown to be consistent with experimental x-ray power scaling. Simulations of an array of helical wires show a substantial reduction in the amplitude of the instability.