Efficiency enhancement in a single-pass Raman free electron laser

M. H. Rouhani and B. Maraghechi<br/> Efficiency enhancement in free electron laser (FEL) with ion channel and axial magnetic field is compared. By using Maxwell’s equations and nonwiggler averaged equation of motion of electron beam, a set of coupled nonlinear differential equations is derived in the slowly varying amplitude and wave mechanics n … [Phys. Plasmas 16, 093110 (2009)] published Wed Sep 16, 2009.