The Study Of Nonlinear Ion Acoustic Solitary Waves In Multi-component Complex Plasmas

It is known to all that the theoretical and numerical studies of plasma are widely used in many astrophysical problems,space physics and laboratory plasma,and the ion acoustic solitary wave has attracted people's attention due to its wide application in the environment of heterogeneous multi-component complex plasma.Many scholars have studied ion acoustic solitary waves and found that the system parameters in these plasmas have a great influence on the characteristics of solitary waves.The theoretical and experimental results show that the waves play an important role in turbulent heating,laser plasma interaction,particle acceleration and other aspects.Based on the theory of magnetohydrodynamics,the korteweg-de Vries(KdV)equation and the modified kadomtsev-petviashvili equation,namely mKP equation,were respectively derived to describe the nonlinear ion acoustic solitary waves in multi-component complex plasma by using the nonlinear wave equations as the model and the reduced perturbation method.We studied the complicated by using the method of numerical simulation,the non extensive distribution of the electrons in the plasma characteristics of ion noise solitary wave propagation,the influence of using the two methods(reduced perturbation method and Sagdeev potential method)of double temperature electronic non-uniform plasma multicomponent complex ion acoustic propagation characteristics such as the width of the soliton,maximum amplitude,a basic level of understanding.The main research contents of this paper are as follows:1.In this paper,the basic propagating characteristics of the(3+1)-dimensional nonlinear ion acoustic solitary waves in a multi-component complex plasma have been studied.The(3+1)-dimensional ZK equation for nonlinear ion acoustic solitary waves in a multi-component complex plasma system has been obtained by using the reductive perturbation method.Moreover,the important influence of different parameters on the nonlinear strength,amplitude,width and propagation characteristics of nonlinear ion acoustic solitary waves are also been discussed by the numerical simulation method.2.In this paper,the basic propagating characteristics of the(2+1)-dimensional ion acoustic solitary waves(IASW)in inhomogeneous plasma withtwo-temperature-electrons have been studied.The(2+1)-dimensional mKP equation for nonlinear ion acoustic solitary waves in inhomogeneous plasma with two-temperature-electrons system has been obtained by using the reductive perturbation method.The important influence of different parameters and vortex distributed electrons on the nonlinear strength,amplitude,width and propagation characteristics of nonlinear ion acoustic solitary waves are also been discussed by the numerical simulation method.Moreover,the possibility of solitons formation and the effect of the system parameters on solitons are studied by Sagdeev potential method.It is found that only compressive solitary waves exist in this system by this two methods.