High performance tokamak experiments with a ferritic steel wall on JFT-2M

K. Tsuzuki, H. Kimura, H. Kawashima, M. Sato, K. Kamiya, K. Shinohara, H. Ogawa, K. Hoshino, M. Bakhtiari, S. Kasai, K. Uehara, H. Sasao, Y. Kusama, N. Isei, Y. Miura, T. Ogawa, M. Yamamoto, T. Shibata, K. Kikuchi, K. MiyachiT. Ito, H. Ajikawa, S. Nomura, H. Tsutsui, R. Shimada, T. Ido, Y. Hamada, N. Fukumoto, M. Nagata, T. Uyama, H. Niimi, S. Yatsu, N. Kayukawa, T. Hino, Y. Hirohata, Y. Nagashima, A. Ejiri, A. Amemiya, Y. Sadamoto, A. Tsushima

研究成果: ジャーナルへの寄稿学術誌査読

43 被引用数 (Scopus)


Compatibility between the plasma and low activation ferritic steel, which is a candidate material for fusion demonstration reactors, has been investigated step by step in the JFT-2M tokamak. We have entered the third stage of the Advanced Material Tokamak EXperiment (AMTEX), where the inside of the vacuum vessel wall is completely covered with ferritic steel plates ferritic inside wall (FIW). The effects of a FIW on the plasma production, impurity release, the operation region, and H-mode characteristics have been investigated. No negative effect has been observed up to now. A high normalized beta plasma of βN ∼ 3, having both an internal transport barrier and a steady H-mode edge was obtained. A remarkable reduction in ripple trapped loss from 0.26 MW m-2 (without ferritic steel) to less than 0.01 MW m-2 was demonstrated by the optimization of the thickness profile of FIW. A code to calculate fast ion losses, taking into account the full three-dimensional magnetic structure was developed, and values obtained using the code showed good agreement with experimental results. Thus, encouraging results are obtained for the use of this material in the demo-reactor.

ジャーナルNuclear Fusion
出版ステータス出版済み - 10月 2003

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学


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