Damping of perpendicular magnetosonic pulses in a two-ion-species plasma

被引：15

作者：

Dogen, D ^{[1
]}

Toida, M ^{[1
]}

Ohsawa, Y ^{[1
]}

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 46401, Japan

来源：

PHYSICS OF PLASMAS | 1998年 / 5卷 / 05期

关键词：

D O I：

10.1063/1.872788

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 damping of finite-amplitude magnetosonic pulses propagating perpendicular to a magnetic field in a collisionless plasma containing two ion species (majority light ions and minority heavy ions) is studied through theory and simulation. A magnetosonic pulse accelerates heavy ions in the direction parallel to the wave front; this cross-filed motion of heavy ions then generates a long-wavelength perturbation behind the original pulse. Because of these processes the original pulse is damped. The damping rate of a solitary pulse is theoretically obtained. It decreases with increasing amplitude. The damping is further investigated by means of a one-dimensional, fully electromagnetic code based on a three-fluid model. The theoretically obtained damping rate is in good agreement with the simulation result. Also, it is confirmed that small-amplitude periodic waves are not damped. (C) 1998 American Institute of Physics.

引用

页码：1298 / 1304

页数：7

共 24 条

[1] THE STRUCTURE OF STRONG COLLISION-FREE HYDROMAGNETIC WAVES [J].