NONLINEAR EVOLUTION OF WHISTLER WAVE MODULATIONAL INSTABILITY

被引：9

作者：

KARPMAN, VI ^{[1
]}

LYNOV, JP ^{[1
]}

MICHELSEN, PK ^{[1
]}

RASMUSSEN, JJ ^{[1
]}

机构：

[1] HEBREW UNIV JERUSALEM, RACAH INST PHYS, IL-91904 JERUSALEM, ISRAEL

来源：

PHYSICS OF PLASMAS | 1995年 / 2卷 / 09期

关键词：

D O I：

10.1063/1.871451

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 nonlinear evolution of the modulational instability of whistler waves coupled to fast magnetosonic waves (FMS) and to slow magnetosonic waves (SMS) is investigated. Results from direct numerical solutions in two spatial dimensions agree with simplified results from a set of ordinary differential equations obtained from a Hamiltonian formulation of the governing equations. The long-time evolution of the modulational instability for the FMS-coupling shows a quasi-recurrent behavior with a slow spreading of the energy to higher and higher mode numbers. For the SMS-coupling, no recurrent behavior is found and the energy is gradually leaking to higher mode numbers while the spatial evolution of the modulation tends to develop small scale ''spikes.'' (C) 1995 American Institute of Physics.

引用

页码：3302 / 3319

页数：18

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