Self-Focusing of Quadruple Gaussian Laser Beam in Relativistic Plasma using Moment Theory Approach

摘要

In the present paper, propagation characteristics of quadruple Gaussian laser beam in a relativistic plasma has been investigated using moment theory approach. Second order non-linear differential equation has been formulated analytically in the presence of relativistic non-linearity. The propagation of beam width parameter for a particular set of parameters has been studied with the distance of propagation. Effect of plasma density, laser beam intensity and lateral beam separation is discussed graphically. We have found that the incremental of normalized plasma density and lateral beam separation enhance the focusing effect. The conclusions obtained are applicable in high harmonic generation, X-ray generation and inertial confinement fusion (ICF).