Identification of Spurious Modes of High-Power 77-GHz Gyrotron for Collective Thomson Scattering in LHD
スポンサーリンク
概要
- 論文の詳細を見る
Frequency measurements at 74-80 GHz were conducted for the identification and suppression of spurious modes from the 77-GHz gyrotron, which was originally introduced as a power source for electron cyclotron resonance heating and is now also used as a probe beam for the collective Thomson scattering (CTS) diagnostic. The spurious modes are excited as the gyrotron output powe ris turned on and off by controlling the anode voltage. These modes are harmful for the CTS diagnostic, even though their power is less than approximately 50 dB below than that of the main mode. The measured frequency of one of the spurious modes is approximately 74.7 GHz. The cavity structure, starting current calculation, and mode competition calculation suggest that the spurious mode is the TE17,6 mode. The result is important for optimizing the gyrotron operation as a CTS probe beam and suppressing or minimizing the spurious mode excitation.
- 社団法人 プラズマ・核融合学会の論文
著者
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SHIMOZUMA Takashi
National Insitute for Fusion Science
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YOSHIMURA Yasuo
National Insitute for Fusion Science
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NISHIURA Masaki
National Institute for Fusion Science
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KUBO Shin
Deparment of Physics,Faculty of Science,Kyoto University
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KARIYA Tsuyoshi
Plasma Research Center, University of Tsukuba
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IGAMI Hiroe
National Institute for Fusion Science
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Tatematsu Yoshinori
Research Center For Development Of Far Infrared Region University Of Fukui
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Imai Tsuyoshi
Plasma Research Center, University of Tsukuba
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ITO Satoshi
National Live Stock Breeding Center
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Tanaka Kenji
National Food Institute
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Saito Teruo
Research Center for Developement of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan
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OGASAWARA Shinya
Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8463, Japan
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Kobayashi Sakuji
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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TANAKA Kenji
National Institute for Fusion Science
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TAKAHASHI Hiromi
National Institute for Fusion Science, Toki 509-5292 Japan
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MINAMI Ryutaro
Plasma Research Center, University of Tsukuba
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MIZUNO Yoshinori
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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TATEMATSU Yoshinori
Research Center for Development of FIR, University of Fukui
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TAKITA Yasuyuki
National Institute for Fusion Science
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SAITO Teruo
Research Center for Development of FIR, University of Fukui
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OKADA Kohta
National Institute for Fusion Science
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KARIYA Tsuyoshi
Plasma Research Center, Tsukuba University
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ITO Satoshi
National Institute for Fusion Science
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IMAI Tsuyoshi
Plasma Research Center, Tsukuba University
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MINAMI Ryutaro
Plasma Research Center, Tsukuba University
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MIZUNO Yoshinori
National Institute for Fusion Science
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KOBAYASHI Sakuji
National Institute for Fusion Science
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TAKAHASHI Hiromi
National Institute for Fusion Science
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OGASAWARA Shinya
Department of Energy and Technology, Nagoya University
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OGASAWARA Shinya
Department of Energy Engineering and Technology, Nagoya University
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