Optimization of microwave reflection gratings for electron cyclotron resonance heating in O2 mode

Author

Mangold, O. ; Kasparek, W. ; Holzhauer, E.

Author_Institution

Inst. fur Plasmaforschung, Stuttgart Univ., Germany

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

717

Lastpage

718

Abstract

For the application as in-vessel microwave mirrors in fusion reactors, for which the geometry cannot be freely chosen, microwave reflection gratings are being optimized with respect to single order diffraction efficiencies and polarisation independent phase behavior. By simulations using the boundary element method (BEM), which is very fast for this purpose, it is possible, to obtain numerical optimization of Fourier gratings, resulting in almost perfect (efficiency >99%) grating structures.

Keywords

Fourier transform optics; boundary-elements methods; holographic gratings; mirrors; optimisation; plasma radiofrequency heating; plasma simulation; BEM; Fourier gratings; O2 mode; boundary element method; electron cyclotron resonance heating; fusion reactors; in-vessel microwave mirrors; microwave reflection gratings; numerical optimization; polarisation independent phase; single order diffraction; Cyclotrons; Diffraction gratings; Electromagnetic heating; Electrons; Fusion reactors; Geometry; Mirrors; Polarization; Reflection; Resonance;

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.2004.1422293

Filename

1422293