Wave excitation by REB in a waveguide filled with warm, magnetized plasma

An important application of a relativistic electron beam (REB) is investigated, i.e., minimizing the energy losses in a waveguide filled with a warm, magnetized plasma. An analytical calculation is performed to find the plasma dielectric constant, which leads one to apply the boundary conditions at the plasma conductor interface. The dispersion equations which describes the electromagnetic waves, hence their damping rate in the waveguide, are derived. The necessary condition for the field stability and the amplification coefficient of these waves are obtained. The electron beam is found to play a crucial role in the field stability and in controlling the field attenuation in the waveguide.