The results of numerical simulation of the interaction between the relativistic electron beam focused by constant magnetic field and the field of an axisymmetric overmoded periodic waveguide are reported. Cyclotron resonant signal amplification and cyclotron absorbtion ranges were revealed, the dynamics of beam electrons was studied, as well as the role of beam parameters that affect the cyclotron resonance.
07.57.Hm Infrared, submillimeter wave, microwave, and radiowave sources
Department of General Physiscs, Faculty of Physics, Lomonosov Moscow State University. Leninskie Gory, Moscow 119991, Russia