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Title: The Role of Electron Density in Magnetic Turbulence

Abstract

Inertial range energy transfer, decorrelation, and energy spectra are studied analytically and numerically for strongly anisotropic MHD turbulence augmented by electron density evolution. Applications include interstellar turbulence and magnetic turbulence in fusion devices. For long wavelengths (compared to the ion gyroradius) magnetic and kinetic energies are equipartitioned through interactions that decorrelates on the Alfvenic time scale. Internal energy transfer is governed by advection and decorrelates on the eddy turnover time scale. For short wavelengths, the roles of internal and kinetic energy reverse. Magnetic and internal energies are equipartitioned by the kinetic Alfven interaction, while kinetic energy evolves under a decoupled fluid straining interaction. The spectral indices for magnetic, kinetic, and internal energies are -3/2, -3/2, and -7/4 for long wavelengths and, -2, -5/3, and - 2 for short wavelengths

Authors:
; ;
Publication Date:
Research Org.:
University of Wisconsin-Madison, WI (US); National Sciences, Eckerd College (US)
Sponsoring Org.:
(US)
OSTI Identifier:
783561
Report Number(s):
DOE/ER/53291-330
TRN: US0108344
DOE Contract Number:  
FG02-89ER53291
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Other Information: Submitted to Physics of Plasmas; PBD: 1 Jun 2000
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON DENSITY; ENERGY SPECTRA; ENERGY TRANSFER; KINETIC ENERGY; TURBULENCE; WAVELENGTHS; MAGNETOHYDRODYNAMICS; ALFVEN WAVES; THERMONUCLEAR REACTORS

Citation Formats

Terry, P.W., McKay, Cavendish, and Fernandex, Eduardo. The Role of Electron Density in Magnetic Turbulence. United States: N. p., 2000. Web.
Terry, P.W., McKay, Cavendish, & Fernandex, Eduardo. The Role of Electron Density in Magnetic Turbulence. United States.
Terry, P.W., McKay, Cavendish, and Fernandex, Eduardo. Thu . "The Role of Electron Density in Magnetic Turbulence". United States.
@article{osti_783561,
title = {The Role of Electron Density in Magnetic Turbulence},
author = {Terry, P.W. and McKay, Cavendish and Fernandex, Eduardo},
abstractNote = {Inertial range energy transfer, decorrelation, and energy spectra are studied analytically and numerically for strongly anisotropic MHD turbulence augmented by electron density evolution. Applications include interstellar turbulence and magnetic turbulence in fusion devices. For long wavelengths (compared to the ion gyroradius) magnetic and kinetic energies are equipartitioned through interactions that decorrelates on the Alfvenic time scale. Internal energy transfer is governed by advection and decorrelates on the eddy turnover time scale. For short wavelengths, the roles of internal and kinetic energy reverse. Magnetic and internal energies are equipartitioned by the kinetic Alfven interaction, while kinetic energy evolves under a decoupled fluid straining interaction. The spectral indices for magnetic, kinetic, and internal energies are -3/2, -3/2, and -7/4 for long wavelengths and, -2, -5/3, and - 2 for short wavelengths},
doi = {},
journal = {Physics of Plasmas},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {6}
}