High-power terahertz Cherenkov radiation in oversized slow-wave structure

Abstract

The paper presents the results of numerical simulation of the interaction of a relativistic electron beam and an electromagnetic field in an oversized slow-wave structure near π-type oscillations of the TM01 mode in the terahertz (>300 GHz) frequency range. The calculations used the developed 2.5D hybrid electromagnetic model. A tubular electron beam with a current of 5 kA and energy of 400–490 keV was injected into a 40-mm diameter slow-wave structure. In the calculations, radiation with a power of 250 MW was obtained.