Spectroscopic Diagnostics for Spatial Density Distribution of Plasmoid by Pellet Injection in the Large Helical Device
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概要
- 論文の詳細を見る
To investigate the behavior of a plasmoid consisting of pellet ablatant ionized by background plasma, two dimensional imaging measurements of high-speed spectroscopy have been developed using a fast camera in the Large Helical Device (LHD). The diagnostic system provides density distribution of the plasmoid. The density distribution is determined using the Stark broadening width of the Balmer-β line. Stark broadening profile can be evaluated from the intensity ratio measured using narrow-band optical filters having different full width at half maximum. Two dimensional images of the plasmoid are obtained by a fast camera connected to a bifurcated fiber scope with two objective lenses. An initial result shows that the plasmoid density is obtained within a factor of 2 by imaging measurements.
- 社団法人 プラズマ・核融合学会の論文
著者
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YAMADA Hiroshi
National Insitute for Fusion Science
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GOTO Motoshi
National Insitute for Fusion Science
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SAKAMOTO Ryuichi
National Insitute for Fusion Science
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MOTOJIMA Gen
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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SAKAMOTO Ryuichi
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
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