Azimuthal inhomogeneity of turbulence structure and its impact on intermittent particle transport in linear magnetized plasmas

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Abstract

Fluctuation component in the turbulence regime is found to be azimuthally localized at a phase of the global coherent modes in a linear magnetized plasma PANTA. Spatial distribution of squared bicoherence is given in the azimuthal cross section as an indicator of nonlinear energy transfer function from the global coherent mode to the turbulence. Squared bicoherence is strong at a phase where the turbulence amplitude is large. As a result of the turbulence localization, time evolution of radial particle flux becomes bursty. Statistical features such as skewness and kurtosis are strongly modified by the localized turbulence component, although contribution to mean particle flux profile is small.

Original languageEnglish
Article number112301
JournalPhysics of Plasmas
Volume22
Issue number11
DOIs
Publication statusPublished - Nov 1 2015

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inhomogeneity
turbulence
flux (rate)
kurtosis
skewness
transfer functions
spatial distribution
energy transfer
cross sections
profiles

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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title = "Azimuthal inhomogeneity of turbulence structure and its impact on intermittent particle transport in linear magnetized plasmas",
abstract = "Fluctuation component in the turbulence regime is found to be azimuthally localized at a phase of the global coherent modes in a linear magnetized plasma PANTA. Spatial distribution of squared bicoherence is given in the azimuthal cross section as an indicator of nonlinear energy transfer function from the global coherent mode to the turbulence. Squared bicoherence is strong at a phase where the turbulence amplitude is large. As a result of the turbulence localization, time evolution of radial particle flux becomes bursty. Statistical features such as skewness and kurtosis are strongly modified by the localized turbulence component, although contribution to mean particle flux profile is small.",
author = "T. Kobayashi and Inagaki Shigeru and Makoto Sasaki and Yusuke Kosuga and H. Arakawa and Takuma Yamada and Yoshihiko Nagashima and Y. Miwa and Naohiro Kasuya and akihide fujisawa and Sanae Itoh and K. Itoh",
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T1 - Azimuthal inhomogeneity of turbulence structure and its impact on intermittent particle transport in linear magnetized plasmas

AU - Kobayashi, T.

AU - Shigeru, Inagaki

AU - Sasaki, Makoto

AU - Kosuga, Yusuke

AU - Arakawa, H.

AU - Yamada, Takuma

AU - Nagashima, Yoshihiko

AU - Miwa, Y.

AU - Kasuya, Naohiro

AU - fujisawa, akihide

AU - Itoh, Sanae

AU - Itoh, K.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - Fluctuation component in the turbulence regime is found to be azimuthally localized at a phase of the global coherent modes in a linear magnetized plasma PANTA. Spatial distribution of squared bicoherence is given in the azimuthal cross section as an indicator of nonlinear energy transfer function from the global coherent mode to the turbulence. Squared bicoherence is strong at a phase where the turbulence amplitude is large. As a result of the turbulence localization, time evolution of radial particle flux becomes bursty. Statistical features such as skewness and kurtosis are strongly modified by the localized turbulence component, although contribution to mean particle flux profile is small.

AB - Fluctuation component in the turbulence regime is found to be azimuthally localized at a phase of the global coherent modes in a linear magnetized plasma PANTA. Spatial distribution of squared bicoherence is given in the azimuthal cross section as an indicator of nonlinear energy transfer function from the global coherent mode to the turbulence. Squared bicoherence is strong at a phase where the turbulence amplitude is large. As a result of the turbulence localization, time evolution of radial particle flux becomes bursty. Statistical features such as skewness and kurtosis are strongly modified by the localized turbulence component, although contribution to mean particle flux profile is small.

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