High power oscillation experiment of a prototype gyrotron for 300 GHz band collective Thomson scattering diagnostics in LHD

Author

Saito, Takashi ; Yamaguchi, Yoshio ; Tatematsu, Y. ; Kasa, Jun ; Kotera, Masaki ; Ikeuchi, Shinji ; Idehara, T. ; Kubo, Satoshi ; Shimozuma, Takashi ; Tanaka, Kiyoshi ; Nishiura, Masaki

Author_Institution

Res. Center for Dev. of Far-Infrared Region, Univ. of Fukui, Fukui, Japan

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

A high power 300 GHz band pulse gyrotron has been developed for use in the collective Thomson scattering (CTS) diagnostics in Large Helical Device. The design concept for stable and single mode oscillation was experimentally verified with a prototype tube of 295 GHz at the fundamental harmonic. A highest power approaching 250 kW was realized. Based on the results of the prototype tube, design of the next tube is under way for practical use in the CTS experiments.

Keywords

gyrotrons; harmonic oscillators; helical waveguides; LHD; collective Thomson scattering diagnostics; frequency 295 GHz; frequency 300 GHz; high power oscillation experiment; large helical device; prototype gyrotron; single mode oscillation; Cavity resonators; Electron tubes; Gyrotrons; Harmonic analysis; Oscillators; Prototypes; Scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956190

Filename

6956190