Excitation of eddy fields in periodic waveguides by a high-intensity electron beam

A method is worked out for analyzing a self-consistent interaction on of a linear electron beam with fields in a multimode periodic waveguide used in relativistic microwave electronics. Investigation of a finite length system showed that at the waveguide surface there is an eddy field corresponding to the surface wave. The electron beam generates entrained fields with a maximum strength in the beam region. Scattering of the surface wave field and the electron beam field by the system inhomogeneities results in the production of a high-power circumaxial radiation.