Magnetic Helicity Signature Produced by Cross-Field 2D Turbulence

被引：6
|
作者：
Markovskii, S. A. [1 ]
Vasquez, Bernard J. [1 ]
机构：
[1] Univ New Hampshire, Inst Study Earth Oceans & Space, Ctr Space Sci, Durham, NH 03824 USA
来源：
PROCEEDINGS OF THE THIRTEENTH INTERNATIONAL SOLAR WIND CONFERENCE (SOLAR WIND 13) | 2013年 / 1539卷
关键词：
Solar wind plasma; Turbulence; Plasma turbulence; Hybrid methods; DISSIPATION RANGE; ALFVEN WAVES; CYCLOTRON; FLUCTUATIONS; SIMULATION; SPECTRUM; ANGLE;
D O I：
10.1063/1.4811032
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Hybrid numerical simulations of freely decaying 2D turbulence are presented. The background magnetic field is perpendicular to the simulation plane, which eliminates linear kinetic Alfven waves from the system. The normalized magnetic helicity of the initial large-scale fluctuations is zero, while the normalized cross-helicity is not. As the turbulence evolves, it develops nonzero magnetic helicity at smaller scales, in the proton kinetic range. In the quasi-steady state of evolution, the magnetic helicity spectrum has a peak consistent with the solar wind observations.
引用
收藏
页码：239 / 242
页数：4
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