Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD

Takeshi IDO; Akihiro SHIMIZU; Masaki NISHIURA; Shinji KATO; Haruhisa NAKANO; Akimitsu NISHIZAWA; Yasuji HAMADA; Mitsuhiro YOKOTA; Kiwamu TSUKADA; Hideki OGAWA; Tomoyuki INOUE; Katsumi IDA; Mikiro YOSHINUMA; Sadayoshi MURAKAMI; Kenji TANAKA; Kazumichi NARIHARA; Ichihiro YAMADA; Kazuo KAWAHATA; Naoki TAMURA; the LHD Experimental Group

doi:10.1585/pfr.3.031

Regular Articles

Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD

Takeshi IDO, Akihiro SHIMIZU, Masaki NISHIURA, Shinji KATO, Haruhisa NAKANO, Akimitsu NISHIZAWA, Yasuji HAMADA, Mitsuhiro YOKOTA, Kiwamu TSUKADA, Hideki OGAWA, Tomoyuki INOUE, Katsumi IDA, Mikiro YOSHINUMA, Sadayoshi MURAKAMI, Kenji TANAKA, Kazumichi NARIHARA, Ichihiro YAMADA, Kazuo KAWAHATA, Naoki TAMURA, the LHD Experimental Group

Author information

Takeshi IDO
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Akihiro SHIMIZU
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Masaki NISHIURA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Shinji KATO
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Haruhisa NAKANO
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Akimitsu NISHIZAWA
Tono Geoscience Centre, Japan Atomic Energy Agency, Toki, Gifu, Japan.
Yasuji HAMADA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Mitsuhiro YOKOTA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Kiwamu TSUKADA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Hideki OGAWA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Tomoyuki INOUE
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Katsumi IDA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Mikiro YOSHINUMA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Sadayoshi MURAKAMI
Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
Kenji TANAKA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Kazumichi NARIHARA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Ichihiro YAMADA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Kazuo KAWAHATA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
Naoki TAMURA
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
the LHD Experimental Group
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan

Keywords: heavy ion beam probe, HIBP, electrostatic potential, electric field

JOURNAL FREE ACCESS

2008 Volume 3 Pages 031

DOI https://doi.org/10.1585/pfr.3.031

Details

Abstract

A heavy ion beam probe (HIBP) using a 3 MV tandem accelerator was installed in Large Helical Device (LHD). It is designed to measure the electrostatic potential in the core region directly. It is calibrated and can be used to measure the electrostatic potential profiles in LHD plasmas. The radial electric field (E_r) obtained from the potential profiles measured using the HIBP agrees with that measured by charge exchange spectroscopy (CXS). E_r predicted by the neoclassical theory is also compared to that measured using the HIBP, and is in good agreement with the experimental results in the core region.

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