A two-dimensional magnetohydrodynamic stability model for helicity-injected devices with open flux
A two-dimensional magnetohydrodynamic stability model for helicity-injected devices with open flux
复制标题
具有开放通量的螺旋注入装置的二维磁流体动力学稳定性模型
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
R. Linden
中科院分区：
文献类型：
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作者：
D. Brennan;P. Browning;R. Linden
本文提出了球形托卡马克和球形托卡马克的理想磁流体动力学（MHD）稳定性模型，包括电流对在螺旋注入电流驱动中起关键作用的开磁通的影响。的spheromak平衡与开放和封闭的磁通和现实的电流分布代表的螺旋注入状态的稳定性进行了研究，在开放磁通的扭结不稳定性被证明占主导地位的倾斜模式，在封闭的磁通作为开放磁通电流密度的增加。以前的一维模型扩展到更现实的二维平衡，适当地将封闭的磁通量以及开放的磁通量穿透电极的边界的区域。一个新的稳定性代码SCOTS已经开发和基准，它可以确定在这种几何形状的理想MHD模式的增长率。该代码的坐标系已经开发，使其顺利地跨越封闭和开放通量之间的分界线，从而不会强加…
Models of the ideal magnetohydrodynamic (MHD) stability of spheromaks and spherical tokamaks are presented, including the effects of current on the open flux which plays a key role in helicity-injected current drive. The stability of spheromak equilibria with both open and closed flux and realistic current profiles representative of helicity-injected state is investigated, where a kink instability in the open flux is shown to dominate a tilt mode in the closed flux as the open flux current density is increased. A previous one-dimensional model is extended to more realistic two-dimensional equilibria which properly incorporate a region of closed magnetic flux as well as open flux penetrating the boundaries at electrodes. A new stability code SCOTS has been developed and benchmarked which can determine the growth rates of ideal MHD modes in this geometry. The coordinate system for this code has been developed such that it extends smoothly across the separatrix between closed and open flux, thus not imposing...