Title :
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
fDate :
4/1/1999 12:00:00 AM
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;
Journal_Title :
Plasma Science, IEEE Transactions on
