Self-Calibrated Measurement of Ion Flow Using a Fine Multihole Directional Langmuir Probe
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概要
- 論文の詳細を見る
A fine multihole directional Langmuir probe (FM-DLP) has been developed to measure ion Mach number and tested in an electron cyclotron resonance (ECR) plasma. It is found that the FM-DLP can measure the ion Mach number with the same method used for a conventional directional Langmuir probe (DLP). Moreover, the sensitivity of the FM-DLP is almost twice as high as that of the conventional DLP by changing the aspect ratio of the hole that collects ion saturation current. It is also found that the electron saturation current of the FM-DLP is markedly reduced to the level of ion saturation current; thus, the current–voltage characteristics of the FM-DLP become similar to those of an emissive probe, which suggests the emissive-probe-like function of the FM-DLP. We have demonstrated that the FM-DLP can measure the plasma potential, which enables us to determine the calibration factor without other diagnostic tools. Therefore, it is concluded that the FM-DLP has a self-calibration capability for ion flow measurement.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2010-03-25
著者
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YOSHIMURA Shinji
National Institute for Fusion Science
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Terasaka Kenichiro
Interdisciplinary Graduate School Of Engineering Science Kyushu University
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Tetsushi Katahira
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Kohei Ogiwara
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Kenichiro Terasaka
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Katahira Tetsushi
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Mitsutoshi Aramaki
Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya 464-8603, Japan
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Masayoshi Y.
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Shinji Yoshimura
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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