Experimental study of a Cerenkov free-electron laser

摘要

Abstract: This paper presents the experimental results of a Cherenkov free-electron laser that employs an annular relativistic electron beam with energy of $gamma@0 $LSEQ 2.0 and current of I $LSEQ 2.5kA, passing through a dielectric-lined waveguide, to generate coherent electromagnetic radiation. Powerful Cherenkov free-electron laser radiation has been observed at a frequecny range from 8 GHz to 12 GHz. The peak power is 2MW, and the operating efficiency is about 0.6%. !8