A Study of Beam-wave Interaction Parameters on an X-band Sheet Beam Klystron

Abstract

The sheet beam klystron is a new kind of microwave vacuum device, which uses a high aspect ratio, thin rectangular beam to reduce space charge effects, increase power capability and beam-wave interaction efficiency. In this paper, two main beam-wave interaction parameters: coupling coefficient and beam-loading were studied, the theoretical formula and a 3D PIC simulation code were used to compute them respectively, and the results of two methods were compared.

Design of dielectric loaded Sheet beam Klystron cavity

“…The initial estimation of important parameters of the cavity such as Q, R/Q has been done using 3D codes. There is about 20-50% increase in the R/Q value using this design compared to conventional barbell cavity [3]. The design is being optimized for the better results.…”