Journal ArticleDOI
Plasma Edge Turbulence
Akira Hasegawa,Masahiro Wakatani +1 more
TLDR
In this paper, model-coupling equations for the resistive drift-wave instability were derived and numerically solved to study the properties of turbulence near a plasma edge, and the wavenumber spectrum of the turbulence was found to exhibit an inverse cascade to form an isotropic, two-dimensional Kolmogorov spectrum, in the large wave-number regime.Abstract:
Model mode-coupling equations for the resistive drift-wave instability are derived and numerically solved to study the properties of turbulence near a plasma edge. The wavenumber spectrum of the turbulence is found to exhibit an inverse cascade to form an isotropic, two-dimensional Kolmogorov spectrum, ${k}^{\ensuremath{-}3}$, in the large-wave-number regime. The turbulence has a broad frequency spectrum with a large saturation level and produces Bohm-type particle diffusion.read more
Citations
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Journal ArticleDOI
A review of zonal flow experiments
TL;DR: A review of zonal flow experiments is presented in this article, with a brief presentation of the current state of the art, diagnostics and data processing techniques for turbulence and zonal flows and the peripheral issues of ZFL physics.
Journal ArticleDOI
Fundamental Statistical Descriptions of Plasma Turbulence in Magnetic Fields
TL;DR: In this article, a pedagogical review of the history and current status of statistical theories of plasma turbulence is undertaken, focusing on conceptual foundations and methodology, not practical applications, and a general expression for the renormalized dielectric function is deduced.
Journal ArticleDOI
A collisional drift wave description of plasma edge turbulence
Masahiro Wakatani,Akira Hasegawa +1 more
TL;DR: In this paper, model-coupling equations for the resistive drift wave instability are numerically solved for realistic parameters found in tokamak edge plasmas, and the Bohm diffusion is found to result if the parallel wavenumber is chosen to maximize the growth rate for a given value of the perpendicular Wavenumber.
Journal ArticleDOI
Turbulent structure in the edge plasma of the TEXT tokamak
TL;DR: In this article, a reversal has been observed in the mean phase velocity of the turbulent fluctuations in the edge plasma of the TEXT tokamak, which can be described by a model in which the wave velocity in the lab frame is dominated by a nonuniform Er×B velocity and a gradient driven drift.
Journal ArticleDOI
Quasi-two-dimensional dynamics of plasmas and fluids.
Wendell Horton,Akira Hasegawa +1 more
TL;DR: This article reviews the linear and nonlinear dynamics of the quasi-two-dimensional aspect of plasmas and planetary atmosphere starting from the introduction of the ideal model equation (CHM equation) and extending into the most recent progress in plasma turbulence.