Wake Fields in a Three-Layer Cylindrical Waveguide

The resonant properties of wake fields in a three-layer cylindrical waveguide are investigated. A metal-dielectric waveguide is considered, the walls of which are covered from the inside with a thin low-conductivity metal layer that prevents charge accumulation on the dielectric surface and, at the same time, absorbs residual gas molecules. The distorting effect of the inner metal coating on the resonant characteristics of the wake fields is estimated. Various combinations of geometric and electromagnetic parameters of the structure are considered in order to optimize it as a beam guide with minimal losses or a source of monochromatic radiation.