Development of an X-band advanced-concept input system for high-power gyroklystron

Author

Xu, Xiaoxi ; Liu, C. ; Anderson, J. ; Cheng, J. ; Lawson, W.J. ; Hogan, B.P. ; Granatstein, Victor L.

Author_Institution

Lab. for Plasma Res., Maryland Univ., College Park, MD, USA

Volume

27

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

520

Lastpage

530

Abstract

The development of an X-band triaxial input system for the high-power gyroklystron amplifier experiment at the University of Maryland, College Park, is proposed and discussed. In order to obtain high mode purity of a TE₀₁₁ mode in an overmoded coaxial input cavity while maintaining high coupling efficiency, a coaxial dual-cavity input structure with an outer TE₄₁₁ mode and an inner TE₀₁₁ mode coaxial cavity has been designed to obtain a low Q and to avoid mode distortion due to the coupling aperture between the input waveguide and the input cavity. A loaded quality factor of 73 and a resonant frequency of 8.570 GHz with high mode purity have been obtained for the inner TE₀₁₁ mode coaxial cavity. The experimental results are in good agreement with the theoretical designs. The details of the design methods and cold-test results of the X-band triaxial input system are presented in this paper

Keywords

Q-factor; cavity resonators; gyrotrons; harmonics; klystrons; 8.570 GHz; TE₀₁₁ mode; X-band advanced-concept input system; coaxial dual-cavity input structure; coupling aperture; coupling efficiency; high mode purity; high-power gyroklystron; inner TE₀₁₁ mode; loaded quality factor; mode distortion; outer TE₄₁₁ mode; overmoded coaxial input cavity; triaxial input system; Apertures; Coaxial components; Design methodology; High power amplifiers; Klystrons; Plasmas; Pulse amplifiers; Radio frequency; Tellurium; Testing;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.772281

Filename

772281