On the bicoherence analysis of plasma turbulence
On the bicoherence analysis of plasma turbulence
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DOI：
10.1063/1.2062627
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发表时间：
2005-10
影响因子：
2.2
通讯作者：
K. Itoh;Y. Nagashima;S. Itoh;P. Diamond;A. Fujisawa;M. Yagi;A. Fukuyama
中科院分区：
文献类型：
--
作者：
K. Itoh;Y. Nagashima;S. Itoh;P. Diamond;A. Fujisawa;M. Yagi;A. Fukuyama
本文讨论了漂移波和纬向流系统中涨落的双相干性。在强漂移波湍流中，宽带波动被激发，双相干被检查。一个朗之万方程形式主义的湍流相互作用，使我们能够将双相干系数的非线性力的投影到测试模式。的依赖性的总和双相干的纬向流的振幅澄清。还强调了观察双相的重要性。研究结果为测量漂移波与纬向流系统的非线性相互作用提供了依据。
The bicoherence of fluctuations in a system of drift waves and zonal flows is discussed. In strong drift-wave turbulence, where broadband fluctuations are excited, the bicoherence is examined. A Langevin equation formalism of turbulent interactions allows us to relate the bicoherence coefficient to the projection of nonlinear force onto the test mode. The dependence of the summed bicoherence on the amplitude of zonal flows is clarified. The importance of observing biphase is also stressed. The results provide a basis for measurement of nonlinear interaction in a system of drift waves and zonal flow.