Influence Of Guiding Field On Nonlinear Wave In Space Plasma

With the discovery of space plasma and the development of aerospace technology the physics of celestial bodies and space plasma have been greatly promoted and developed.The study of nonlinear wave propagating characteristics in space plasma and the interaction between spacecraft and flight environment have become one of the hot topics all over the world.In this paper,the theoretical model is established by the theory of Magnetohydrodynamics(MHD),based on plasma physics,and the theoretical calculation and computer numerical simulation methods are used to study the subject.Firstly,the Zakharov-Kuznetsov equation and its solitary wave solution are derived to describe the three-dimensional electron acoustic solitary waves in plasma containing Tsallis nonthermal electron by using the reduced perturbation method.The influence of the nonthermal electron distribution of Tsallis on the nonlinear intensity,amplitude and width of the 3-D electron acoustic solitary wave,and the propagation characteristics of the electron acoustic solitary wave are analyzed.Secondly,the professional MHD numerical simulation software USim is used to simulate the process of plasma jet encountering obstacles with magnetic field from the dual-temperature MHD model with reference to the experimental equipment,so as to study the influence of the spacecraft’s own guidance field on the plasma.Then,the influence of guidance field and its different structures on the basic physical parameters of space plasma and the interaction between spacecraft and flight environment are analyzed.Beside,the possibilities of using guidance field of spacecraft to solve the problems about space garbage collection,black barrier mitigation and vortex suppression is discussed.