Influence Of Polarization Of Laser Beam On The Nonlinear Wave Structure In Magnetized Plasma

In the ignition process of laser fusion,the interaction between an intense laser beam and plasma can produce various parametric instability and nonlinear effects.The nonlinear interaction between an intense laser beam and plasma is of great significance in various basic research and technical applications,including harmonic generation,self-focusing,tail field excitation,relativistic photoconductivity,laser pulse frequency shift,pulse compression and the propagation of relativistic electromagnetic solitary wave.The nonlinear interactions,especially electromagnetic solitary waves,both from the perspective of basic research and their potential applications in inertial confinement fast ignition mechanism and electron acceleration,have attracted extensive attention and research.In this paper,a magnetized plasma model is established and studied,and the structure and propagation characteristics of solitary waves are numerically studied.The main research contents and results are as follows.On the basis of the nonlinear dispersion relationship of electromagnetic waves in magnetized plasma and the nonlinear governing equation satisfied by the transverse field envelope derived by Karpman method,the solitary wave solution is obtained in one-dimensional case.The solitary wave solution is numerically analyzed,and the influence of various parameters in magnetized plasma on the half width of wave packet soliton is analyzed.The results show that in the case of right-handed circularly polarized laser beam,the half width of solitary wave decreases with the increase of electron number density,and increases with the increase of magnetic field intensity.In the case of left-handed circularly polarized laser beam,the half width of solitary wave gradually increases with the increase of electron number density,and decreases with the increase of magnetic field intensity.