Three-dimensional simulation of laser acceleration in a reversed free-electron laser

On the basis of the method of radiation field potential decomposition into modes related to the source, which is known in the theory as a free electron laser (FEL), numerical three-dimensional simulation of acceleration of an intense electron beam in a reversed FEL (RFEL) was carried out. It is shown that in RFEL electrons can be accelerated from 10 to 130 MeV at the beam current exceeding 1 kA at the length of 1 m and laser power of ∼1 TW. The part of laser radiation energy transferred to the electrons is ∼10-30%, the part of accelerated electrons from the injected ones being ∼30%, energy apread in accelerated beam ∼1%, rated emittance and radius being 0.6x10-2 radxcm and 0.2 mm (0.45x10-2 and 0.5 in the inlet) respectively. Dependence of electron accelerated beam parameters on resonance phase, input current of electron beam, laser beam focus location was investigated. Permissible errors in the wiggler manufacture are evaluated numerically