Test particle acceleration in three-dimensional magnetohydrodynamic turbulence

被引：55

作者：

Dmitruk, P

Matthaeus, WH

Seenu, N

Brown, MR

机构：

[1] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[2] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 597卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

acceleration of particles; MHD; turbulence;

D O I：

10.1086/379751

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform numerical experiments of test particle acceleration on turbulent magnetic and electric fields obtained from pseudospectral direct numerical solutions of the compressible three-dimensional MHD equations. We find consistent acceleration of the particles to many times the plasma characteristic (Alfven) speed and extended power laws in the density distribution of energies. Scaling laws of maximum and mean energy of particles with the nominal gyrofrequency and the MHD electric field are observed and a simple estimate is presented.

引用

收藏

页码：L81 / L84

页数：4

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