<RESEARCH REPORT>IMPURITY ORIGIN DURING ICRF HEATING IN JIPP T-IIU TOKAMAK
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概要
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Replacing stainless steel limiters by graphite limiters, we found that radiations from iron and titanium ions were significantly reduced. Total radiation and loop voltage also decreased. This indicates the limiters are the major impurity sources both in Ohmic and rf heating phases. Although titanium radiations increased with rf power injected by an antenna with titanium Faraday shield, the maximum intensity was much smaller than those in experiment where the titanium-flashed stainless steel limiters were used. Thus it has been found that Faraday shield is less important as an impurity source than limiters. Toroidal asymmetry observed for OII radiations suggests that the energetic charge-exchange neutrals play a role in releasing oxygen from the wall and that those energetic particles are relatively abundant in the toroidal sections near the antenna. The radiation H_α+D_α decreases during rf pulse around the limiter, which may be due to the change in hydrogen/deuterium recycling at the limiter. The reduction of H_α+D_α is greater with graphite limiters than with stainless steel limiters. The relation between recycling and impurity release is briefly discussed.
- 核融合科学研究所の論文
著者
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Toi K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Ogawa I.
Research Center for Development of Far Infrared Region, University of Fukui
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Tetsuka T.
Research Information Center Institute Of Plasma Physics Nagoya University
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Tanaka S.
Biol. Lab. Nippon Med. Schl.
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Sato K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Kawahata K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Hiroe S.
Research Information Center Institute Of Plasma Physics Nagoya University
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WATARI T.
Research Information Center, Institute of Plasma Physics, Nagoya University
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ANDO R.
Research Information Center, Institute of Plasma Physics, Nagoya University
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FUJITA J.
Research Information Center, Institute of Plasma Physics, Nagoya University
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HIROKURA S.
Research Information Center, Institute of Plasma Physics, Nagoya University
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KAKO E.
Research Information Center, Institute of Plasma Physics, Nagoya University
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KAWASUMI Y.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Noda N.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Ohkubo K.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Tanahashi S.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Taniguchi Y.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Kako E.
Research Information Center Institute Of Plasma Physics Nagoya University:national Laboratory For Hi
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Kawasumi Y.
Research Information Center Institute Of Plasma Physics Nagoya University
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Hirokura S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Sunako K.
Research Information Center Institute Of Plasma Physics Nagoya University:tokai University
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Terumichi Y.
Research Information Center Institute Of Plasma Physics Nagoya University:department Of Physics Facu
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Ando R.
Research Information Center Institute Of Plasma Physics Nagoya University
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Sato K.
Dept. Biol. Fac. Sci. Tokyo Metro. Univ.
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Noda N.
Research Information Center Institute Of Plasma Physics Nagoya University
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Fujita J.
Research Information Center Institute Of Plasma Physics Nagoya University
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Sato K.
Research Information Center Institute Of Plasma Physics Nagoya University:tokai University
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Takasugi K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Watari T.
Institute Of Plasma Physics Nagoya University
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Watari T.
Research Information Center Institute Of Plasma Physics Nagoya University
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Tanahashi S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Ohkubo K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Ogawa I.
Research Information Center Institute Of Plasma Physics Nagoya University
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