On the bicoherence analysis of plasma turbulence

K. Itoh; Y. Nagashima; S. I. Itoh; P. H. Diamond; A. Fujisawa; M. Yagi; A. Fukuyama

doi:10.1063/1.2062627

On the bicoherence analysis of plasma turbulence

K. Itoh, Y. Nagashima, S. I. Itoh, P. H. Diamond, A. Fujisawa, M. Yagi, A. Fukuyama

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48 Citations (Scopus)

Abstract

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.

Original language	English
Article number	102301
Pages (from-to)	1-9
Number of pages	9
Journal	Physics of Plasmas
Volume	12
Issue number	10
DOIs	https://doi.org/10.1063/1.2062627
Publication status	Published - Nov 11 2005

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All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Cite this

Itoh, K., Nagashima, Y., Itoh, S. I., Diamond, P. H., Fujisawa, A., Yagi, M., & Fukuyama, A. (2005). On the bicoherence analysis of plasma turbulence. Physics of Plasmas, 12(10), 1-9. [102301]. https://doi.org/10.1063/1.2062627

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10.1063/1.2062627