Emission of relativistic electron bunches in a circular diaphragmatic waveguide

The longitudinally uniform circular diaphragmatic waveguide (CDW) was considered. Expressions for determining the loaded Q-factor of lossy (Q _L1) and lossless (Q _L1⁰) cells and the loaded Q-factor Q _L of a section of length l were derived. An expression for determining the electrical amplitude of the radiation field produced by a relativistic bunch with charge q, moving along the axis of CDW with series resistance R _s was derived. The electron beam energy, radiation power, and electronic efficiency were calculated.