Regulating drift-wave plasma turbulence into spatiotemporal patterns by pinning coupling.
Regulating drift-wave plasma turbulence into spatiotemporal patterns by pinning coupling.
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DOI：
10.1103/physreve.84.016207
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Panpan Liu;Lei Yang;Z. Deng;Xingang Wang
中科院分区：
文献类型：
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作者：
Panpan Liu;Lei Yang;Z. Deng;Xingang Wang
利用混沌控制中的钉扎耦合技术，我们研究了长谷川-米玛方程所描述的二维漂移波等离子体湍流如何被调节成不同的时空图案。分析和数值计算表明，根据靶面结构的不同，调节湍流所需的钉扎强度会有很大变化。更具体地说，随着靶面波数的增加，临界钉扎强度呈指数标度增加。此外，在钉扎规则的转变和瞬变过程中，湍流的模式都是以分层的方式被抑制的，即通过模式波数的顺序来抑制。这些发现对漂移波湍流的动力学有了深入的了解，也为设计新的现实世界湍流控制技术提供了参考。
Using the technique of pinning coupling in chaos control, we investigate how the two-dimensional drift-wave plasma turbulence described by the Hasegawa-Mima equation can be regulated into different spatiotemporal patterns. It is shown both analytically and numerically that, depending on the pattern structure of the target, the pinning strength necessary for regulating the turbulence could have a large variation. More specifically, with the increase of the wave number of the target, the critical pinning strength is found to be increased by a power-law scaling. Moreover, in both the transition and transient process of the pinning regulation, the modes of the turbulence are found to be suppressed in a hierarchical fashion, that is, by the sequence of mode wave number. The findings give insight into the dynamics of drift-wave turbulence, as well as indicative to the design of new control techniques for real-world turbulence.