Non-local turbulent effect on internal transport barrier collapse in reversed shear configuration

S. Tokunaga, M. Yagi, S. I. Itoh, K. Itoh

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

The mechanism of transport barrier collapse in reversed shear configuration is investigated using a global ion temperature gradient driven drift wave (ITG) turbulence simulation code. The transport barrier collapse event is explained in the context of non-local meso-scale interaction. It is found that the turbulence evolution and the sustainment of the transport barrier is sensitive to the safety factor profile. However, some common meso-scale modes are excited via various non-linear interaction channels whether or not a meso-scale mode in the vicinity of the q profile minimum has resonant surfaces. The non-linear interaction among these non-local modes makes long range correlation possible and carries energy from the core region to the q minimum region. It was shown that such linkage can lead to the collapse of the transport barrier and the change of the global temperature profile.

本文言語英語
論文番号012030
ジャーナルJournal of Physics: Conference Series
123
DOI
出版ステータス出版済み - 2008

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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