Bi-Coherence Analysis of Fluctuations with Long Distance Correlation in Toroidal Plasmas
スポンサーリンク
概要
- 論文の詳細を見る
Macro-scale temperature fluctuations, which have long radial correlation length (of the order of the plasma radius), have been discovered on Large Helical Device (LHD). In this paper, non-linear coupling between the long-range fluctuations and microscopic fluctuations is investigated using cross bi-coherence analysis. The significant cross bi-coherence between long-range fluctuations and micro-fluctuations is observed in the range of frequency f < 100 kHz, where f is the frequency of microscopic fluctuations. It is found that the squared bi-coherence and bi-phase for this three-wave coupling is weakly dependent on the frequency of microscopic fluctuations. These observations demonstrate that the microscopic fluctuations are coherently interacting with long-range fluctuations.
- 2012-03-15
著者
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KUBO Shin
National Insitute for Fusion Science
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SHIMOZUMA Takashi
National Insitute for Fusion Science
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KAWAHATA Kazuo
National Insitute for Fusion Science
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YAMADA Hiroshi
National Insitute for Fusion Science
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NAGAYAMA Yoshio
National Insitute for Fusion Science
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TOKUZAWA Tokihiko
National Insitute for Fusion Science
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Inagaki Shigeru
Research Institute For Applied Mechanics Kyushu University
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Tamura Naoki
National Institute For Fusion Science
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Yagi Masatoshi
Research Instittue For Applied Mechanics Kyushu University
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Itoh Sanae-i.
Research Instittue For Applied Mechanics Kyushu University
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Tanaka Kenji
National Food Institute
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Fujisawa Akihide
Research Institute For Applied Mechanics Kyushu University
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Shimozuma Takashi
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Tokuzawa Tokihiko
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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KOBAYASHI Tatsuya
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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ITOH Kimitaka
Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Ida Katsumi
Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Kasuya Naoyuki
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Kawahata Kazuo
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Tamura Naoki
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Nagayama Yoshio
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Kubo Shin
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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Yamada Hiroshi
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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ITOH Kimitaka
Itoh Research Center for Plasma Turbulence, Kyushu University
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KOBAYASHI Tatsuya
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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KOBAYASHI Tatsuya
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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