Observation of multi-scale turbulence and non-local transport in LHD plasmas | Zendy

T. Tokuzawa | Zendy; S. Inagaki | Zendy; K. Ida | Zendy; K. Itoh | Zendy; T. Ido | Zendy; A. Shimizu | Zendy; H. Takahashi | Zendy; S. Kitajima | Zendy; N. Tamura | Zendy; M. Yoshinuma | Zendy; H. Tsuchiya | Zendy; I. Yamada | Zendy; K. Tanaka | Zendy; T. Akiyama | Zendy; Y. Nagayama | Zendy; K. Kawahata | Zendy; K. Y. Watanabe | Zendy; H. Yamada | Zendy

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Observation of multi-scale turbulence and non-local transport in LHD plasmas

Author(s) -

T. Tokuzawa,

S. Inagaki,

K. Ida,

K. Itoh,

T. Ido,

A. Shimizu,

H. Takahashi,

S. Kitajima,

N. Tamura,

M. Yoshinuma,

H. Tsuchiya,

I. Yamada,

K. Tanaka,

T. Akiyama,

Y. Nagayama,

K. Kawahata,

K. Y. Watanabe,

H. Yamada

Publication year - 2014

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.4876619

Subject(s) - physics , turbulence , plasma , electric field , curvature , computational physics , temporal resolution , mechanics , optics , nuclear physics , geometry , quantum mechanics , mathematics

We have studied two types of spatio-temporal turbulence dynamics in plasmas in the Large Helical Device, based on turbulence measurements with high spatial and temporal resolution. Applying conditional ensemble-averaging to a plasma with Edge-Localized Modes (ELMs), fast radial inward propagation of a micro-scale turbulence front is observed just after ELM event, and the propagation speed is evaluated as ??100m/s. A self-organized radial electric field structure is observed in an electrode biasing experiment, and it is found to realize a multi-valued state. The curvature of the radial electric field is found to play an important role for turbulence reduction

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