Numerical study of the magnetic electron drift vortex mode turbulence in a nonuniform magnetoplasma

被引：2

作者：

Shaikh, Dastgeer ^{[1
,2
]}

Eliasson, B. ^{[3
,4
]}

Shukla, P. K. ^{[3
,4
,5
,6
,7
]}

机构：

[1] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA

[2] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA

[3] Ruhr Univ Bochum, Inst Theoret Phys 4, D-44780 Bochum, Germany

[4] Umea Univ, Dept Phys, SE-90187 Umea, Sweden

[5] Univ Strathclyde, Scottish Univ Phys Alliance, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

[6] Inst Super Tecn, Inst Plasmas & Fusao Nucl, GoLP, P-1049001 Lisbon, Portugal

[7] Univ KwaZulu Natal, Sch Phys, ZA-4000 Durban, South Africa

来源：

PHYSICAL REVIEW E | 2009年 / 79卷 / 06期

基金：

美国国家科学基金会;

关键词：

drift instability; magnetic fields; plasma density; plasma magnetohydrodynamics; plasma production by laser; plasma simulation; plasma temperature; plasma turbulence; LARGE-SCALE STRUCTURE; WEIBEL INSTABILITY; SELF-ORGANIZATION; FIELDS; WAVES; PLASMA; GENERATION; TRANSPORT;

D O I：

10.1103/PhysRevE.79.066404

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A simulation study of the magnetic electron drift vortex (MEDV) mode turbulence in a magnetoplasma in the presence of inhomogeneities in the plasma temperature and density, as well as in the external magnetic field, is presented. The study shows that the influence of the magnetic field inhomogeneity is to suppress streamerlike structures observed in previous simulation studies without background magnetic fields. The MEDV mode turbulence exhibits nonuniversal (non-Kolmogorov-type) spectra for different sets of the plasma parameters. In the presence of an inhomogeneous magnetic field, the spectrum changes to a 7/3 power law, which is flatter than without magnetic field gradients. The relevance of this work to laser-produced plasmas in the laboratory is briefly mentioned.

引用

页数：6

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