Title :
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
fDate :
27 Sept.-1 Oct. 2004
Abstract :
A quasi-optical mode converter is used in the TE34,19, 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;
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
DOI :
10.1109/ICIMW.2004.1422268
