Development of a matching optics unit (MOU) for the coaxial ITER gyrotron at KIT

Author

Jin, J. ; Gantenbein, G. ; Kern, S. ; Rzesnicki, T. ; Thumm, M.

Author_Institution

Assoc. EURATOM-KIT, Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany

fYear

2011

fDate

2-7 Oct. 2011

Firstpage

1

Lastpage

2

Abstract

Closed corrugated waveguide transmission lines operating in the HE₁₁ mode will be used to transmit the powerful radiation from the coaxial-cavity gyrotrons to the ITER tokamak for Electron Cyclotron Resonance Heating (ECRH) and Current Drive (CD). A Match Optics Unit (MOU) has been developed to transform the gyrotron output into a Gaussian mode distribution with optimal parameters to maximize the coupling efficiency of the TEM₀₀ Gaussian distribution to the HE₁₁ mode of the corrugated waveguide. The calculation results reveal that the coupling efficiency of the Gaussian-mode like wave beam to the HE₁₁ mode is approximately 96.3%.

Keywords

Gaussian distribution; Tokamak devices; coaxial waveguides; gyrotrons; laser mirrors; optical waveguides; plasma radiofrequency heating; transmission lines; HE₁₁ mode; KIT; TEM₀₀ Gaussian distribution; closed corrugated waveguide transmission lines; coaxial ITER gyrotron; coupling efficiency; current drive; electron cyclotron resonance heating; matching optics unit; tokamak; Couplings; Gyrotrons; Mirrors; Optical waveguides; Particle beams; Surface waves; Transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Conference_Location

Houston, TX

ISSN

2162-2027

Print_ISBN

978-1-4577-0510-6

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/irmmw-THz.2011.6105122

Filename

6105122