Turbulence and transport characteristics of a barrier in a toroidal plasma

A. Fujisawa, A. Shimizu, H. Nakano, S. Ohsima, K. Itoh, H. Iguchi, Y. Yoshimura, T. Minami, K. Nagaoka, C. Takahashi, M. Kojima, S. Nishimura, M. Isobe, C. Suzuki, T. Akiyama, Y. Nagashima, K. Ida, K. Toi, T. Ido, S. I. ItohK. Matsuoka, S. Okamura, P. H. Diamond

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32 Citations (Scopus)

Abstract

Turbulence and zonal flow at a transport barrier are studied with twin heavy ion beam probes in a toroidal helical plasma. A wavelet analysis is used to extract turbulence properties, e.g. spectra of both density and potential fluctuations, the coherence and the phase between them and the dispersion relation. Particle transport estimated from the fundamental characteristics is found to clearly rise with their intermittent activities after the barrier is broken down. Time-dependent analysis reveals that the intermittency of turbulence is correlated with the evolution of the stationary zonal flow.

Original languageEnglish
Pages (from-to)S205-S212
JournalPlasma Physics and Controlled Fusion
Volume48
Issue number4
DOIs
Publication statusPublished - Apr 1 2006

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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    Fujisawa, A., Shimizu, A., Nakano, H., Ohsima, S., Itoh, K., Iguchi, H., Yoshimura, Y., Minami, T., Nagaoka, K., Takahashi, C., Kojima, M., Nishimura, S., Isobe, M., Suzuki, C., Akiyama, T., Nagashima, Y., Ida, K., Toi, K., Ido, T., ... Diamond, P. H. (2006). Turbulence and transport characteristics of a barrier in a toroidal plasma. Plasma Physics and Controlled Fusion, 48(4), S205-S212. https://doi.org/10.1088/0741-3335/48/4/S15