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Title: SPECTRUM OF KINETIC-ALFVEN TURBULENCE

Abstract

A numerical study of strong kinetic-Alfven turbulence at scales smaller than the ion gyroscale is presented, and a phenomenological model is proposed that argues that magnetic and density fluctuations are concentrated mostly in two-dimensional structures, which leads to their Fourier energy spectra E(k ){proportional_to}k {sup -8/3} , where k is the wavevector component normal to the strong background magnetic field. The results may provide an explanation for recent observations of magnetic and density fluctuations in the solar wind at sub-proton scales.

Authors:
;  [1]
  1. Department of Physics, University of Wisconsin, Madison, WI 53706 (United States)
Publication Date:
OSTI Identifier:
22078474
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 758; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALFVEN WAVES; DENSITY; ENERGY SPECTRA; FLUCTUATIONS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; NUMERICAL ANALYSIS; PROTONS; SOLAR WIND; TURBULENCE

Citation Formats

Boldyrev, Stanislav, and Perez, Jean Carlos. SPECTRUM OF KINETIC-ALFVEN TURBULENCE. United States: N. p., 2012. Web. doi:10.1088/2041-8205/758/2/L44.
Boldyrev, Stanislav, & Perez, Jean Carlos. SPECTRUM OF KINETIC-ALFVEN TURBULENCE. United States. doi:10.1088/2041-8205/758/2/L44.
Boldyrev, Stanislav, and Perez, Jean Carlos. Sat . "SPECTRUM OF KINETIC-ALFVEN TURBULENCE". United States. doi:10.1088/2041-8205/758/2/L44.
@article{osti_22078474,
title = {SPECTRUM OF KINETIC-ALFVEN TURBULENCE},
author = {Boldyrev, Stanislav and Perez, Jean Carlos},
abstractNote = {A numerical study of strong kinetic-Alfven turbulence at scales smaller than the ion gyroscale is presented, and a phenomenological model is proposed that argues that magnetic and density fluctuations are concentrated mostly in two-dimensional structures, which leads to their Fourier energy spectra E(k ){proportional_to}k {sup -8/3} , where k is the wavevector component normal to the strong background magnetic field. The results may provide an explanation for recent observations of magnetic and density fluctuations in the solar wind at sub-proton scales.},
doi = {10.1088/2041-8205/758/2/L44},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 758,
place = {United States},
year = {2012},
month = {10}
}