Boundary of the geodesic acoustic eigenmode in the vicinity of the magnetic separatrix

Y. Nagashima, K. Itoh, A. Fujisawa, K. Shinohara, Sanae Itoh, T. Ido, M. Yagi, K. Hoshino, A. Ejiri, Y. Takase, K. Uehara, Y. Miura

研究成果: Contribution to journalArticle査読

12 被引用数 (Scopus)

抄録

We present a detailed investigation of the geodesic acoustic eigenmode (GAEM) profile in the vicinity of the last closed flux surface (LCFS) in the JFT-2M tokamak. Envelope and spectral peak frequency of the GAEM vanish near the LCFS obtained by an equilibrium reconstitution code. Spatial changes in mean plasma gradients (the electron temperature, electron density and floating potential) are correlated with the boundary. This does not contradict that the GAEM can have a node at the LCFS. Discussions of an inverse problem and the application of this GAEM measurement to an experimental test of the LCFS location calculated by the equilibrium reconstitution code are presented.

本文言語英語
論文番号065019
ジャーナルPlasma Physics and Controlled Fusion
51
6
DOI
出版ステータス出版済み - 7 9 2009

All Science Journal Classification (ASJC) codes

  • 原子力エネルギーおよび原子力工学
  • 凝縮系物理学

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