Propagation characteristics of non-Gaussian laser beam in a plasma with density ramp using Moment Theory Approach

摘要

In this paper, propagation characteristics of non-Gaussian laser beam in a plasma with density ramphave been studied by considering the combined effect of ponder-motive and relativistic non linearity. The formulation is based on numerical analysis of second order non-linear differential equation by using moment theory approach for appropriate parameters. We observe that self-focusing enhances with increase in beam intensity and plasma frequency. The conclusions drawn are practicable in high harmonic generation, X-ray generation and inertial confinement fusion.