Observation of Minor Collapse of Current-Carrying Plasma in LHD
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概要
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A minor collapse observed in current-carrying plasma has been investigated in Large Helical Device (LHD). The magnetic configuration with high central rotational transform has ι/2π = 1 surface at the core region and is relatively unstable for the m/n = 1/1 mode (here, m and n are the poloidal and toroidal mode number, respectively). When the beam-driven current exceeds a certain value, the m/n = 1/1 mode grows with a growth time of ˜30 ms and causes a sudden drop of the plasma stored energy and the electron temperature, and it also limits the plasma current itself. A local flattening in an electron temperature profile appears just after the minor collapse. The mode does not rotate and stays at the same spatial location. The possibility of pressure- and current-driven magneto-hydro dynamics (MHD) instabilities is discussed.
- 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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IDA Katsumi
National Insitute for Fusion Science
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INAGAKI Shigeru
National Insitute for Fusion Science
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NARIHARA Kazumichi
National Insitute for Fusion Science
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NARUSHIMA Yoshiro
National Insitute for Fusion Science
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OHDACHI Satoshi
National Insitute for Fusion Science
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SAKAKIBARA Satoru
National Insitute for Fusion Science
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TAKEIRI Yasuhiko
National Insitute for Fusion Science
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WATANABE Kiyomasa
National Insitute for Fusion Science
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YAMADA Ichihiro
National Insitute for Fusion Science
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TAKEIRI Yasuhiko
National Institute for Fusion Science
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YOSHINUMA Mikio
National Institute for Fusion Science
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COOPER Wilfred
CRPP Association Euratom / Confederation Suisse, EPFL
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YAMAGUCHI Taiki
Department of Fusion Science, Graduate University for Advanced Studies
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