Hybrid model for the spectral density of the time development of the excitation energy of langmuir waves in unmagnetized plasmas

Abstract

A hybrid model has been developed for investigating the excitation of electron plasma waves in unmagnetized plasmas in the presence of a time-varying laser radiation field and a static Coulomb field. Energy spectral density of the excited plasma modes has been calculated analytically in wave number time space. The model also provides analytical expressions in a closed form for both the time-resolved and the time-averaged spectral density of the rate of energy absorption at resonance (omega(k)-->omega(0)).