Design studies of a quasi-optical launcher for a 170 GHz, 200–250 kW gyrotron

Author

Jain, Ragini ; Kartikeyan, M.V. ; Thumm, M.

Author_Institution

Dept. Electron. & Comput. Eng., Indian Inst. of Technol. Roorkee, Roorkee, India

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

This paper presents the design study of a quasi-optical launcher for a 170 GHz gyrotron, designed for electron cyclotron heating in an experimental tokamak in India. TE_24,8 has been selected as the operating mode. Quasi-optical (QO) mode converters are used to transform electromagnetic waves of complex structure and polarization generated in gyrotron cavities into a linearly polarized, Gaussian-like beam suitable for transmission [1]. A quasi-optical mode converter is the combination of an open waveguide antenna (launcher) and a mirror system. Optimization of the mode-converter is done by varying the design parameters and launcher parameters using LOT.

Keywords

Tokamak devices; electromagnetic launchers; electromagnetic wave polarisation; gyrotrons; optical couplers; plasma radiofrequency heating; waveguide antennas; Gaussian-like beam; India; complex structure; electromagnetic waves; electron cyclotron heating; experimental tokamak; frequency 170 GHz; gyrotron; mirror system; open waveguide antenna; polarization; power 200 kW to 250 kW; quasi-optical launcher; quasi-optical mode converter; Beams; Cyclotrons; Electromagnetic scattering; Electromagnetic wave polarization; Electrons; Gaussian processes; Gyrotrons; Heating; Tellurium; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5325653

Filename

5325653