磁化等离子体中斜传播的离子孤波

近几年卫星空间电场测量经常证认出局地非线性离子静电波,它们可能与极光粒子加速有直接关系。这些静电波被认为或者是离子声波模的演化,或者是静电离子逥旋波模的演化结果。本文研究了磁场中斜传播小振幅离子非线性波的演化,得到非线性Schrodinger方程。结果表明离子声孤波和离子迴旋孤波都是可能的。计算结果与卫星S(3-3)电场测量比较,可以很好说明部分测量结果。 

Oblique Propagating Ion Solitary Waves in a Magnetized Plasma

In recent years through in-situ electric field measurements in interplanetary space the local nonlinear ion electrostatic waves are often identified. They may be directely related to the acceleration of the auroral particles. These electrostatic waves are considered as either the ion acoustic mode evolution or the ion cyclotron mode evolution. In this paper the evolution of the ion nonlinear waves with small amplitude for oblique propagation in the magnetic fields are studied and the nonlinear Schrodinger equation is obtained. Calculation results show that it is possible for both the ion acoustic and the ion cyclotron solitary waves to exist. After making a comparison of the results with the electric field measurements on board of satellite S3₃ some observations can be well explained.