Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Review Articles
On the Application of Cross Bispectrum and Cross Bicoherence
Sanae-I. ITOHKimitaka ITOHYoshihiko NAGASHIMAYusuke KOSUGA
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2017 Volume 12 Pages 1101003

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Abstract

Bispectrum and bicoherence analysis is a powerful method to analyze nonlinear interaction of turbulent plasmas. In this review, we explain the difference of the bispectrum and bicoherence analysis and possible research that can be pursued with these methods. Basic concept is explained by using several examples from previous successes brought by bicoherence and bispectrum analysis, such as drift wave-zonal flow interaction. Open questions are discussed that can be challenged by these methods. Problems such as spatial transport of fluctuation energy (i.e. turbulence spreading), momentum transport by the triplet correlation, and so on, are treated. Bispectrum and bicoherence analysis can be utilized to expand the forefront of plasma turbulence research.

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© 2017 by The Japan Society of Plasma Science and Nuclear Fusion Research
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