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; Sanae Itoh; K. Matsuoka; S. Okamura; P. H. Diamond

doi:10.1088/0741-3335/48/4/S15

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, Sanae ItohK. Matsuoka, S. Okamura, P. H. Diamond

Research output: Contribution to journal › Article › peer-review

35 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 language	English
Pages (from-to)	S205-S212
Journal	Plasma Physics and Controlled Fusion
Volume	48
Issue number	4
DOIs	https://doi.org/10.1088/0741-3335/48/4/S15
Publication status	Published - Apr 1 2006

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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10.1088/0741-3335/48/4/S15

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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

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, Itoh, S, Matsuoka, K, Okamura, S & Diamond, PH 2006, 'Turbulence and transport characteristics of a barrier in a toroidal plasma', Plasma Physics and Controlled Fusion, vol. 48, no. 4, pp. S205-S212. https://doi.org/10.1088/0741-3335/48/4/S15

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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.",

author = "A. Fujisawa and A. Shimizu and H. Nakano and S. Ohsima and K. Itoh and H. Iguchi and Y. Yoshimura and T. Minami and K. Nagaoka and C. Takahashi and M. Kojima and S. Nishimura and M. Isobe and C. Suzuki and T. Akiyama and Y. Nagashima and K. Ida and K. Toi and T. Ido and Sanae Itoh and K. Matsuoka and S. Okamura and Diamond, {P. H.}",

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T1 - Turbulence and transport characteristics of a barrier in a toroidal plasma

AU - Fujisawa, A.

AU - Shimizu, A.

AU - Nakano, H.

AU - Ohsima, S.

AU - Itoh, K.

AU - Iguchi, H.

AU - Yoshimura, Y.

AU - Minami, T.

AU - Nagaoka, K.

AU - Takahashi, C.

AU - Kojima, M.

AU - Nishimura, S.

AU - Isobe, M.

AU - Suzuki, C.

AU - Akiyama, T.

AU - Nagashima, Y.

AU - Ida, K.

AU - Toi, K.

AU - Ido, T.

AU - Itoh, Sanae

AU - Matsuoka, K.

AU - Okamura, S.

AU - Diamond, P. H.

PY - 2006/4/1

Y1 - 2006/4/1

N2 - 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.

AB - 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.

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VL - 48

SP - S205-S212

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 4

ER -

Turbulence and transport characteristics of a barrier in a toroidal plasma

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