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Fusion Science and Technology Volume 59, 2011 - Issue 4: Selected Papers from the Sixteenth JointWorkshop on Electron Cyclotron Emission And Electron Cyclotron Resonance Heating (EC-16) Sanya, China, April 12–15, 2010
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Technical Paper

High-Efficiency Quasi-Optical Mode Converter for the Coaxial Cavity Gyrotron

Jianbo JinKarlsruhe Institute of Technology (KIT), Association EURATOM-KIT Institute for Pulsed Power and Microwave Technology (IHM), D-76131 Karlsruhe, Germany
,
Tomasz RzesnickiKarlsruhe Institute of Technology (KIT), Association EURATOM-KIT Institute for Pulsed Power and Microwave Technology (IHM), D-76131 Karlsruhe, Germany
,
Stefan KernKarlsruhe Institute of Technology (KIT), Association EURATOM-KIT Institute for Pulsed Power and Microwave Technology (IHM), D-76131 Karlsruhe, Germany
&
Manfred ThummKarlsruhe Institute of Technology (KIT), Association EURATOM-KIT Institute for Pulsed Power and Microwave Technology (IHM), D-76131 Karlsruhe, Germany
Pages 742-748 | Published online: 07 Apr 2017
 
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Abstract

A 2-MW, continuous wave, TE34,19 mode, 170-GHz coaxial cavity gyrotron for the International Thermonuclear Experimental Reactor (ITER) is under development within the European GYrotron Consortium (EGYC). This paper presents the improved design of the quasi-optical mode converter for this gyrotron. The simulation results show that with the improved quasi-optical mode converter, the fundamental Gaussian mode content of the rf beam can be enhanced to 99.1% at the output window plane and the stray radiation in the quasi-optical mode converter could be decreased to 1.2%.

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