Studies of Classical Radiation Emission from Plasma Wave Undulators

Abstract-We examine the characteristics of the classical ra-diation emitted by a relativistic electron beam that Propagates wave. Such a study is useful for evaluating the feasibility of undulators for generating short wavelength radiation. The elec-tron trajectories in a Plasma wave undulator are obtained using perturbation techniques and are then compared to numerical sim-ulation results. The frequency spectrum and angular distribution of the spontaneous radiation emitted by a single electron and the stimulated radiation gain are obtained analytically, and are then compared to 3-D numerical simulations. The characteristics of the Plasma wave unddator are compared to the ac FEL unddator and the conventional FEL. is in the range of 0.1-1.0 cm, and is limited by the practical difficulty of placing very strong and very small permanent peQendicuiar1y through a larg