[Table of Contents]

Plasma and Fusion Research

Volume 2, S1003 (2007)

Regular Articles

On Imaging of Plasma Turbulence
K. ITOH, A. FUJISAWA, Y. NAGASHIMA1), S. -I. ITOH1), M. YAGI1), P. H. DIAMOND2), A. FUKUYAMA3) and K. HALLATSCHEK4)
National Institute for Fusion Science, Toki 509-5292, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
2)
Department of Physics, University of California San Diego, San Diego, CA 92093-0319, U.S.A.
3)
Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
4)
Max-Planck-Institute für Plasmaphysik, D-85748 Garching, Germany
(Received 4 December 2006 / Accepted 23 March 2007 / Published 20 November 2007)

Abstract

We discuss aspects of imaging of plasma turbulence, taking the standpoint that the imaging is a path for induction of law from complex signals. An example of induction of symbol from signals is illustrated. Then the image of plasma turbulence is extended, putting an emphasis on the identification of the nonlinear interaction in turbulence. By employing the bipspectral method, magnitudes of interactions among excited modes are estimated. Interactions between microscopic turbulence and large-scale structures are demonstrated, providing our understanding of structure formation in turbulent plasmas.

Keywords

plasma turbulence, induction of symbol, nonlinear interaction, bispectral analysis, disparate-scale interaction

DOI: 10.1585/pfr.2.S1003

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This paper may be cited as follows:

K. ITOH, A. FUJISAWA, Y. NAGASHIMA, S. -I. ITOH, M. YAGI, P. H. DIAMOND, A. FUKUYAMA and K. HALLATSCHEK, Plasma Fusion Res. 2, S1003 (2007).