Optimization of multi-gap extended output cavity for a G-band sheet beam extended interaction klystron

Author

Shifeng Li ; Zhaoyun Duan ; Fei Wang ; Zhanliang Wang ; Jin Xu ; Yubin Gong

Author_Institution

Inst. of High Energy Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

For a G-band sheet beam extended interaction klystron (SBEIK), an eight-gap extended output cavity that operates in the 2π mode, is optimized by using an equivalent method, in which the external load is replaced by a lossy region in 3D particle-in-cell model. The optimized eight-gap extended output cavity has 681.9 unloaded Q, 952 external Q and 397.3 loaded Q at 220 GHz. The simulations based on the prebunched sheet beam predict that the output power and bandwidth of the eight-gap extended output cavity are larger than 600 W and 200 MHz, respectively. It is efficient for rapidly designing the G-band SBEIK.

Keywords

Q-factor; klystrons; 3D particle-in-cell model; G-band SBEIK; G-band sheet beam extended interaction klystron; bandwidth 200 MHz; eight-gap extended output cavity; equivalent method; frequency 220 GHz; lossy region; multigap extended output cavity; optimized eight-gap extended output cavity; prebunched sheet beam; Cavity resonators; Couplers; Educational institutions; Klystrons; Optimization; Power amplifiers; Power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956273

Filename

6956273