Quasi-pierce angle focusing electrode for a w-band sheet beam gun

Abstract

This paper demonstrates a new design of a quasi-pierce angle focusing electrode (FE, in short) of a sheet beam electron gun. This scheme has been studied by the CST-PARTICLE studio. It indicates that a sheet beam gun with this new focus electrode can produce large beam current, high compression ratio, good laminarity and it is very convenient to adjust the width of electron beam just by changing the width of cathode and corresponding focusing electrode.