On the stabilization of neoclassical magnetohydrodynamic tearing modes using localized current drive or heating
On the stabilization of neoclassical magnetohydrodynamic tearing modes using localized current drive or heating
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DOI：
10.1063/1.872426
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发表时间：
1997-08-01
影响因子：
2.2
通讯作者：
Callen, JD
中科院分区：
文献类型：
--
作者：
Hegna, CC;Callen, JD
讨论了使用局部电流驱动或加热来抑制新古典磁流体动力学 (MHD) 撕裂模式的形成和增长的有效性。使用辅助电流源的最有效方法是使电流沿与平衡自举电流相同的方向流动，并相对于磁岛调整电流的相位，使得电流沉积在磁岛的 O 点上。抑制大磁岛形成所需电流量的理论估计约为平衡电流的百分之几。如果抑制成功，磁岛将在电流源径向定位宽度的数量级处饱和。磁岛 O 点的局部加热也可以产生相对于磁岛生长的稳定效应。驱动电流或加热的影响可以通过使用岛生长的相图来说明。 (C) 1997 年美国物理研究所。
The effectiveness of using localized current drive or heating to suppress the formation and growth of neoclassical magnetohydrodynamic (MHD) tearing modes is addressed. The most efficient way to use an auxiliary current source is to cause current to flow in the same direction as the equilibrium bootstrap current and phase the current relative to the magnetic island such that the current is deposited on the O-point of the island. Theoretical estimates for the amount of required current to suppress the formation of a large magnetic island is of order a few percent of the equilibrium current. If the suppression is successful, the magnetic island will saturate at a width of order the radial localization width of the current source. Localized heating at the O-point of the magnetic island can also produce stabilizing effects relative to magnetic island growth. The effects of the driven current or heating can be illustrated by using a phase diagram of the island growth. (C) 1997 American Institute of Physics.