Magneto-Modulational Instability in Relativistic Plasmas

被引：34
|
作者：
Liu, Y. [1 ,2 ]
Liu, S. Q. [1 ,4 ]
Li, X. Q. [3 ]
机构：
[1] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330047, Peoples R China
[2] Nantong Univ, Sch Sci, Nantong 226019, Peoples R China
[3] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China
[4] Nanchang Univ, Sch Sci, Nanchang 330047, Peoples R China
来源：
CONTRIBUTIONS TO PLASMA PHYSICS | 2011年 / 51卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Quasistatic magnetic field; transverse plasmons; modulational instability; relativistic plasma; LASER-PRODUCED PLASMA; TRANSVERSE PLASMONS; KINETIC-THEORY; FIELDS; GENERATION; RADIATION;
D O I：
10.1002/ctpp.201000011
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：
The behavior of magnetic fields generated by high frequency transverse plasmons in relativistic plasmas can be described by a set of nonlinear coupling equations, which has considered the nonlinear wave-wave, wave-particle interactions and the relativistic effects of electrons. Modulational instability of the spontaneous magnetic fields is investigated on the basis of the nonlinear coupling equations. Analytical and numerical results indicate the self-generated magnetic fields are modulationally unstable and will be localized in a narrow region. The characteristic scale and maximum growth rate of the magnetic fields depend on the average Lorentz factor of electrons and the energy density of transverse plasmons. The relativistic effects of electrons will enhance the self-focusing of magnetic fields. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：51 / 60
页数：10
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