Development of Neutral Molecular Beam Injector for Two-Dimensional Edge Density Measurement
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概要
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A sheet-shaped thermal lithium beam probe has been developed for two-dimensional density measurements in the edge region of the torus plasma. For the production of an intense and uniform beam, the optimization of the nozzle shape and slit width of the beam injector has been performed. Beam density profiles at the observing region in the plasma were estimated with numerical calculations using a Monte Carlo technique for several kinds of nozzles and combinations with slits. Experiments on the test stand were also carried out, and pretty good agreement was found between numerical and experimental results. Based on these examination and optimization for the nozzle and slits, we have constructed a sheet-shaped beam injector for the large helical device. In spite of the long distance (about 3 m) from the injector, it is estimated that the thickness of the sheet-shaped beam is ∼90 mm (full width at half maximum).
- 社団法人 プラズマ・核融合学会の論文
著者
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Morisaki T.
National Institute for Fusion Science
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TAKAHASHI Y.
Department of Medicine, Section of Infectious Diseases, Boston University School of Medicine, Evans
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Motojima O.
National Institute for FnsionScience
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ZUSHI H.
Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
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TSUCHIYA H.
Graduate Universty for Advanced Studies, National Institute for Fusion Science, Toki 509-5292, Japan
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KOMORI A.
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
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TOI K.
National Institute for Fusion Science, Toki 509-5292, Japan
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