[Table of Contents]

Plasma and Fusion Research

Volume 5, 046 (2010)

Review Articles

A Review -Observations of Turbulence and Structure in Magnetized Plasmas
Akihide FUJISAWA
Advanced Fusion Research Center, Research Institute for Applied Mechanics and Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga-kouen 6-1, Kasuga, Fukuoka 816-0812, Japan
(Received 7 May 2010 / Accepted 26 August 2010 / Published 16 December 2010)

Abstract

Magnetized plasma is an non-equilibrium matter rich in nonlinear phenomena; its structural formations are dominated by turbulence. This article provides a brief review of experiments and observations of phenomena occurring in turbulent plasmas, with an emphasis on the methodologies for characterizing turbulence, and visualizing the invisible structure created by turbulence and the internal couplings between the elemental waves that constitute turbulence. Zonal flows, streamers, blobs, and other phenomena are investigated by using analytical methods such as Fourier transformation, wavelet analysis, probabilistic density function analysis, bicoherence, wavelet bicoherence. Finally, the contemporary view of plasma turbulence is presented with discussion of unsolved transport issues in fusion plasmas, such as transport barrier formation and nonlocal transport.

Keywords

turbulence, mesoscale and quasi-coherent structures, energy transfer between turbulence elements, transport barrier formation, zonal flow paradigm, non-local transport

DOI: 10.1585/pfr.5.046

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This paper may be cited as follows:

Akihide FUJISAWA, Plasma Fusion Res. 5, 046 (2010).