Identification of a low plasma-rotation threshold for stabilization of the resistive-wall mode.
Identification of a low plasma-rotation threshold for stabilization of the resistive-wall mode.
复制标题
DOI：
10.1103/physrevlett.98.055002
复制
发表时间：
2007-02
影响因子：
8.6
通讯作者：
M. Takechi;G. Matsunaga;N. Aiba;T. Fujita;T. Ozeki;Y. Koide;Y. Sakamoto;G. Kurita;A. Isayama-
中科院分区：
文献类型：
--
作者：
M. Takechi;G. Matsunaga;N. Aiba;T. Fujita;T. Ozeki;Y. Koide;Y. Sakamoto;G. Kurita;A. Isayama-
通过注入切向中性束控制环形等离子体旋转，研究了等离子体旋转对连续壁模稳定性的影响。观察到的阈值是阿尔文速度的0.3%，远小于以前的实验结果与磁制动。当接近理想壁极限时，这种低临界转动具有非常弱的β依赖性。这些结果表明，对于大型等离子体，如在未来的低旋转聚变反应堆，稳定RWM的额外的反馈控制系统的要求大大降低。
The plasma rotation necessary for stabilization of resistive-wall modes (RWMs) is investigated by controlling the toroidal plasma rotation with external momentum input by injection of tangential neutral beams. The observed threshold is 0.3% of the Alfvén velocity and much smaller than the previous experimental results obtained with magnetic braking. This low critical rotation has a very weak beta dependence as the ideal wall limit is approached. These results indicate that for large plasmas such as in future fusion reactors with low rotation, the requirement of the additional feedback control system for stabilizing RWM is much reduced.