Investigation of compatibility of low activation ferritic steel with high performance plasma by full covering of inside vacuum vessel wall on JFT-2M

K. Tsuzuki, K. Shinohara, K. Kamiya, H. Kawashima, M. Sato, G. Kurita, M. Bakhtiari, H. Ogawa, K. Hoshino, S. Kasai, K. Uehara, Y. Kusama, M. Yamamoto, T. Shibata, K. Kikuchi, H. Tsutsui, R. Shimada, T. Hino, Y. Hirohata, A. AmemiyaY. Sadamoto, Yoshihiko Nagashima, A. Ejiri

Research output: Contribution to journalConference article

8 Citations (Scopus)


Low activation ferritic steel plates were installed in the JFT-2M tokamak to fully cover the inside wall of the vacuum vessel (ferritic inside wall; FIW) as a simulation of the blanket wall of the fusion demonstration reactor. After the physics and engineering design concerns with the ripple reduction, the electro-magnetic force and so on, FIW was installed with a tolerance of a few mm. The ripple reduction was confirmed from the detailed measurement. Tokamak discharges were obtained without changing control system, as predicted theoretically. The reduction of ripple loss of fast ions was clearly demonstrated by both experiments and calculations. Compatibility of FIW with high normalized beta plasma up to 3.3 was demonstrated at relatively far wall position. Preliminary investigation showed that the slowdown of the growth rate occurred with closer wall position, which presumably corresponds to wall stabilization effect.

Original languageEnglish
Pages (from-to)721-725
Number of pages5
JournalJournal of Nuclear Materials
Issue number1-3 PART A
Publication statusPublished - Aug 1 2004
Externally publishedYes
EventProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
Duration: Dec 7 2003Dec 12 2003


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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