Experimental evidence of mode coupling in drift wave intermittent turbulence using a wave number bicoherence analysis
Experimental evidence of mode coupling in drift wave intermittent turbulence using a wave number bicoherence analysis
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DOI：
10.1063/1.2402131
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发表时间：
2006-12-01
影响因子：
2.2
通讯作者：
Klinger, T.
中科院分区：
文献类型：
--
作者：
Brochard, F.;Windisch, T.;Klinger, T.
在圆柱等离子体装置上对时空模耦合进行了实验研究。为此，将双相干分析应用于漂移波起伏的空间分辨测量，以研究波数谱中的非线性耦合。K双相干的使用被证明比omega双相干的使用更准确和直接，揭示了具有比信号的特征周期更短的特征持续时间的双相干爆发。结果表明，在这些过程中可以产生间歇性结构。(C)2006年美国物理研究所。
Spatiotemporal mode coupling is studied experimentally in a cylindrical plasma device. For that purpose, a bicoherence analysis is applied to spatially resolved measurements of drift wave fluctuations in order to study nonlinear coupling in the wave number spectrum. The use of the k bicoherence is shown to be much more accurate and straightforward than one of the omega bicoherence, revealing bicoherence bursts with a characteristic duration shorter than the characteristic period of the signals. It is demonstrated that intermittent structures can be produced during these events. (c) 2006 American Institute of Physics.