Lamb-Dip Laser-Induced Fluorescence Spectroscopy for Measuring Magnetic Field in a Plasma
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概要
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We have developed a Lamb-dip laser-induced fluorescence (LIF) system to precisely measure the local magnetic field strength in a plasma. Utilizing the hole burning effect, we made sharp dips on the LIF spectrum as the frequency markers and accurately determined the Zeeman splitting by reading the frequency interval of the dips. The method is valid even in the conditions where the Doppler broadening of the LIF spectrum is larger than the Zeeman shift. The newly developed LIF system is capable of determining a magnetic field strength on the order of $10^{-4}$ T. It has been demonstrated that the Lamb-dip LIF system can successfully reproduce a very small field inhomogeneity in the HYPER-I linear device.
- 2011-03-25
著者
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YOSHIMURA Shinji
National Institute for Fusion Science
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ARAMAKI Mitsutoshi
Department of Electronics, Nagoya University
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Tanaka Masayoshi
Department Of Chemical Science & Technology Faculty Of Engineering Kyushu University
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Ogiwara Kohei
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Itoh Yuta
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Kato Yoshiyuki
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Aramaki Mitsutoshi
Department of Electrical Engineering and Computer Science, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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Tanaka Masayoshi
Department of Advanced Energy Engineering Science, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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