Compatibility of reduced activation ferritic steel wall with high performance plasma on JFT-2M

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

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Abstract

In JFT-2M, the applicability of reduced activation ferritic steel to a fusion demonstration reactor has been demonstrated mainly concerning the ferromagnetic effect on plasma production, control, stability and confinement. The compatibility of the close ferritic wall with high-normalized beta plasmas has been investigated mainly because the demonstration reactor will utilize the wall stabilization effect. Due to improvements in the operation scenario and the modification of the guard limiter configuration, the region showing good compatibility was extended to the closer wall position (the wall position was normalized to the plasma minor radius; rwall/a∼ 1.25) and the higher normalized beta (βN ∼ 3.5), compared with the previous works with the relatively far wall position and stronger magnetic field (Tsuzuki K. et al 2003 Nucl. Fusion. 43 1288). A reduction in the growth rate of the instability was also observed in the close wall case, which presumably corresponds to the wall stabilization effect, similar to a resistive wall without ferromagnetism.

Original languageEnglish
Article number010
Pages (from-to)966-971
Number of pages6
JournalNuclear Fusion
Volume46
Issue number11
DOIs
Publication statusPublished - Nov 1 2006

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Tsuzuki, K., Kamiya, K., Shinohara, K., Bakhtiari, M., Ogawa, H., Kurita, G., ... Hamada, Y. (2006). Compatibility of reduced activation ferritic steel wall with high performance plasma on JFT-2M. Nuclear Fusion, 46(11), 966-971. [010]. https://doi.org/10.1088/0029-5515/46/11/010