The design of a quasi-optical mode converter for a coaxial-cavity gyrotron

Author

Jin, J. ; Piosczyk, B. ; Michel, G. ; Thumm, M. ; Drumm, O. ; Rzesnicki, T. ; Zhang, S.C.

Author_Institution

Assoc. Euratom, Forschungszentrum Karlsruhe, Germany

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

669

Lastpage

670

Abstract

A quasi-optical mode converter is used in the TE_34,19, 2 MW, CW 170 GHz coaxial cavity gyrotron, which is under development at FZK. The cut of the launcher has been optimized taking the tapering angle of the launcher into account. Further on, the amplitude of the launcher corrugations have been optimized for improved focusing in order to reduce the diffraction losses at the cut. In addition, the influence of phase corrections of a non-quadratic mirror on wave properties has been investigated for a real fabricated surface in comparison to the measurement. Results are reported.

Keywords

convertors; gyrotrons; mirrors; 170 GHz; 2 MW; TE mode converter; coaxial cavity gyrotron; diffraction loss reduction; launcher amplitude; launcher tapering angle; nonquadratic mirror; phase corrections; quasioptical mode converter; wave properties; Coaxial components; Diffraction; Electron beams; Gaussian distribution; Gyrotrons; Mirrors; Optical surface waves; Optical waveguides; Plasmas; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on

Print_ISBN

0-7803-8490-3

Type

conf

DOI

10.1109/ICIMW.2004.1422268

Filename

1422268