Models of Beam-Wave Interaction in Slow-Wave Structures

Abstract

In this chapter we investigate the fundamentals of distributed beam-wave interaction in a slow-wave structure. A dielectric loaded waveguide was chosen as the basic model in the first sections because it enables us to illustrate the essence of the interaction without the complications associated with complex boundary conditions. Throughout this chapter the electron beam is assumed to be guided by a very strong magnetic field such that the electrons’ motion is confined to the longitudinal direction. Furthermore, the kinetic energy of the electrons is assumed to take into consideration the potential depression associated with the injection of a beam into a metallic waveguide.