Excitation of lower hybrid wave by counterpropagating cosh Gaussian laser beams in a magnetized plasma

Abstract

This paper presents a scheme for the excitation of lower hybrid wave (LHW) by beating of two counterpropagating cosh Gaussian (ChG) laser beams in a magnetized plasma. The beating wave having frequency ω=(ω1-ω2) and wave vector k→=k→1+k→2, exerts a pondermotive force on electrons and drive lower hybrid wave in both homogeneous and inhomogeneous plasma. The driver wave acts as a pump wave for the excitation of the lower hybrid wave. We study the variation of the normalized potential and power distribution with respect to normalized frequency under resonance conditions. The appearance of peaks shows the excitation of the lower hybrid waves. The decentred parameter and beamwidth profile of ChG laser beams play an important role in shifting the characteristics of peaks. In results, we also discuss the convective losses, escaping, and trapping conditions of waves in the magnetized plasma.