Evaluation of Fast-Ion Confinement Using a Radially Injected Neutral Beam in the LHD
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概要
- 論文の詳細を見る
The confinement properties of perpendicular fast ions, which have kinetic energies mostly perpendicular to magnetic field lines, are investigated in the Large Helical Device (LHD) using short pulse injections of neutral beams (NB). Fast-ion lifetimes are evaluated using the fast neutral decay times after NB turn-off, where the neutrals are measured by an array of silicon-diode fast neutral analyzers. We found that the lifetime normalized by the 90-degree pitch-angle scattering time can be used as a scale of fast-ion confinement properties in magnetically confined fusion devices. The good confinement properties of the LHDs inwardly shifted configuration were demonstrated using the evaluated normalized lifetimes.
著者
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MURAKAMI Sadayoshi
Department of Nuclear Engineering, Kyoto University
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KANEKO Osamu
National Insitute for Fusion Science
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IKEDA Katsunori
National Insitute for Fusion Science
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ISOBE Mitsutaka
National Insitute for Fusion Science
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OSAKABE Masaki
National Insitute for Fusion Science
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TAKEIRI Yasuhiko
National Insitute for Fusion Science
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TOKUZAWA Tokihiko
National Insitute for Fusion Science
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TSUMORI Katsuyoshi
National Insitute for Fusion Science
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NAKANO Haruhisa
National Institute for Fusion Science
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Kobayashi Shinji
Department Of Applied Chemistry School Of Science And Technology Meiji University
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NAGAOKA Kenichi
National Institute for Fusion Science
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ISOBE Mitsutaka
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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TAKEIRI Yasuhiko
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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ITOH Takafumi
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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TOKUZAWA Tokihiko
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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IKEDA Katsunori
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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TSUMORI Katsuyoshi
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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OSAKABE Masaki
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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