Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Rapid Communications
Experiment for Over 200 kW Oscillation of a 295 GHz Pulse Gyrotron
Yuusuke YAMAGUCHITeruo SAITOYoshinori TATEMATSUShinji IKEUCHIJun KASAMasaki KOTERAIsamu OGAWAToshitaka IDEHARAShin KUBOTakashi SHIMOZUMAMasaki NISHIURAKenji TANAKA
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2013 Volume 8 Pages 1205165

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Abstract

A high-power sub-THz gyrotron is under development as a power source of collective Thomson scattering diagnostic of fusion plasmas. It operates at a fundamental harmonic frequency of 295 GHz. A cavity which realizes stable and efficient single mode oscillation, an electron gun with an intense laminar electron beam, and an internal mode convertor are designed. A maximum oscillation power of 234 kW is achieved with a Gaussian like radiation pattern. The duration of 130 kW pulse is extended up to 30 microseconds, which is limited by the configuration of power supply.

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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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