Development of 300 GHz Band Gyrotron for Collective Thomson Scattering Diagnostics in the Large Helical Device

Teruo SAITO; Yuusuke YAMAGUCHI; Yoshinori TATEMATSU; Masafumi FUKUNARI; Takumi HIROBE; Shunsuke TANAKA; Ryuji SHINBAYASHI; Takashi SHIMOZUMA; Shin KUBO; Kenji TANAKA; Masaki NISHIURA

doi:10.1585/pfr.12.1206013

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Development of 300 GHz Band Gyrotron for Collective Thomson Scattering Diagnostics in the Large Helical Device

Teruo SAITO, Yuusuke YAMAGUCHI, Yoshinori TATEMATSU, Masafumi FUKUNARI, Takumi HIROBE, Shunsuke TANAKA, Ryuji SHINBAYASHI, Takashi SHIMOZUMA, Shin KUBO, Kenji TANAKA, Masaki NISHIURA

Author information

Teruo SAITO
Research Center for Development of Far-Infrared Region, University of Fukui
Yuusuke YAMAGUCHI
Research Center for Development of Far-Infrared Region, University of Fukui
Yoshinori TATEMATSU
Research Center for Development of Far-Infrared Region, University of Fukui
Masafumi FUKUNARI
Research Center for Development of Far-Infrared Region, University of Fukui
Takumi HIROBE
Research Center for Development of Far-Infrared Region, University of Fukui
Shunsuke TANAKA
Research Center for Development of Far-Infrared Region, University of Fukui
Ryuji SHINBAYASHI
Research Center for Development of Far-Infrared Region, University of Fukui
Takashi SHIMOZUMA
National Institute for Fusion Science
Shin KUBO
National Institute for Fusion Science
Kenji TANAKA
National Institute for Fusion Science
Masaki NISHIURA
Graduate School of Frontier Sciences, The University of Tokyo

Keywords: gyrotron, sub-THz, collective Thomson scattering, LHD

JOURNAL FREE ACCESS

2017 Volume 12 Pages 1206013

DOI https://doi.org/10.1585/pfr.12.1206013

Details

Abstract

A 300 GHz pulse gyrotron has been developed for use in collective Thomson scattering (CTS) diagnostics in the Large Helical Device (LHD). Single-mode oscillation power of more than 320 kW was produced. The radiation beam has a Gaussian pattern. The frequency spectrum is very narrow and stable across the pulse width. No competing mode was observed in the oscillation pulse, including during the turn-on and turn-off phases.

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