RADIATION EMITTED BY A BEAM OF PARTICLES CROSSING AN INHOMOGENEOUS ELECTROMAGNETIC-WAVE

A theoretical investigation is made of the time dependence of the spat ial distribution of particles injected perpendicular to the direction of propagation of a linearly polarised inhomogeneous electromagnetic w ave and reflected by this wave. It is shown that such reflection modul ates the particle density in a beam which is homogeneous at injection. Stimulated emission of radiation from a ribbon electron beam reflecte d by a wave is considered. The spectral-angular and polarisation chara cteristics of such radiation are investigated.