Study of Beam-Wave Interaction in a 170-GHz Confocal Gyrotron Traveling-Wave Tube

Author

Youwei Yang ; Sheng Yu ; Tian-Zhong Zhang ; Yanyan Zhang ; Qixiang Zhao

Author_Institution

Terahertz Sci. & Technol. Res. Center, Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

43

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

791

Lastpage

795

Abstract

Confocal gyrotron traveling-wave tube (gyro-TWT) is a novel gyrotron amplifier capable of operating in higher order modes while generating high power at the same time. So far, confocal gyro-TWT has been studied by MIT both in theory and experiment at 140 GHz. In this paper, a center frequency of 170-GHz TE06-mode confocal gyro-TWT is designed theoretically, and it features high power and broadband capabilities. Theoretical investigation predicts that, when the magnetic injection gun is optimized to generate an electron beam of 65 kV, current of 7 A, with a pitch factor of 1.2, this gyro-TWT is of an excellent performance. At a given operating magnetic field of 6.11 T, with an input power of 10 W, a saturated gain of at least 30 dB, 3-dB bandwidth of over 4 GHz and highest efficiency of 17.1% are achieved.

Keywords

amplifiers; electron beams; gyrotrons; travelling wave tubes; MIT; TE-mode confocal gyro-TWT; beam-wave interaction; broadband capability; confocal gyrotron traveling-wave tube; current 7 A; efficiency 17.1 percent; electron beam; frequency 140 GHz; frequency 170 GHz; gyrotron amplifier; magnetic field; magnetic injection gun; pitch factor; power 10 W; voltage 65 kV; Electron beams; Electron tubes; Gyrotrons; Mirrors; Plasmas; Power generation; Radio frequency; Beam-wave interaction; confocal; gyrotron traveling-wave tube (gyro-TWT); gyrotron traveling-wave tube (gyro-TWT).;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2015.2392115

Filename

7027812