Advanced Probe Measurement System in TU-Heliac
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概要
- 論文の詳細を見る
An advanced probe measurement system consisting of high-speed Langmuir probes with a preamplifier and a Copper shield was designed and installed in TU-Heliac. Potential and density fluctuations were measured in the hot-cathode biased plasma, and power spectra were calculated using the complex Fourier transform. There were low frequency fluctuations (f < 10 kHz), high frequency fluctuations (70 < f < 200 kHz) and sharp spectra applied for the plasma production (10 < f < 50 kHz). In the region above 200 kHz, the power decreased by a factor of 1/f2 for the potential fluctuation and 1/f2∼3 for the density fluctuation. The phase shift between potential and density fluctuations was almost 0 rad at ρ = 0.54. On the other hand, the phase shift was not 0 rad at ρ = 0.21, especially in the 100 ∼ 200 kHz region. The high frequency fluctuation at ρ = 0.21 grew on the time scale of 10-5 s, which was obtained from the time dependent signals of the high frequency fluctuation.
著者
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INAGAKI Shigeru
National Insitute for Fusion Science
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NISHIMURA Kiyohiko
National Insitute for Fusion Science
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YOKOYAMA Masayuki
National Insitute for Fusion Science
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Suzuki Yasuhiro
National Agriculture And Food Res. Organization (naro) National Inst. Of Crop Sci.
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Sasao Mamiko
Department Of Physics Osaka University:institute Of Plasma Physics Nagoya Univ
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Okamoto Atsushi
Department Of Biochemistry Osaka Medical College
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Kitajima Sumio
Department Of Quantum Science And Energy Engineering Faculty Of Engineering Tohoku University
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Aoyama Hiroshi
Department Of Cardiology Nihon University Surugadai Hospital
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Shinto Katsuhiro
Department Of Elctronics Doshisha University
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Takahashi Hiromi
Department Of Biotechnology Tokyo University Of Agriculture And Technology
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Tanaka Yutaka
Department Of Astronomy Kyoto University
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UTOH Hiroyasu
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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UTOH Hiroyasu
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
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IWAZAKI Keisuke
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
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UMETSU Hajime
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
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OGAWA Michiaki
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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SHINDE Junji
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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IWAZAKI Keisuke
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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NISHIMURA Kiyohiko
National Institute for Fusion Science, Toki, 509-5292, Japan
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KITAJIMA Sumio
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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INAGAKI Shigeru
National Institute for Fusion Science, Toki, 509-5292, Japan
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SHINTO Katsuhiro
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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SASAO Mamiko
Department of Engineering, Tohoku University
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SASAO Mamiko
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, 980-8579, Japan
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