Experimental evidence of mode coupling in drift wave intermittent turbulence using a wave number bicoherence analysis

被引：25

作者：

Brochard, F. ^{[1
]}

Windisch, T. ^{[1
]}

Grulke, O. ^{[1
]}

Klinger, T. ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany

来源：

PHYSICS OF PLASMAS | 2006年 / 13卷 / 12期

关键词：

D O I：

10.1063/1.2402131

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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.

引用

页数：6

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