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

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.
Authors:
 [1] ; ; ; ; ; ;  [2] ;  [3] ;  [2] ;  [3] ;  [4] ;  [5] ;  [3] ;  [6] ;  [1] ;  [3]
  1. National Institute for Fusion Science, Toki 509-5292 (Japan)
  2. Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580 (Japan)
  3. (Japan)
  4. Teikyo University, 6-22 Misakimachi, Omuta 836-8505 (Japan)
  5. Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580 (Japan)
  6. Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580 (Japan)
Publication Date:
OSTI Identifier:
22489835
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CROSS SECTIONS; ENERGY TRANSFER; FLUCTUATIONS; NEUTRAL-PARTICLE TRANSPORT; NONLINEAR PROBLEMS; PLASMA; SPATIAL DISTRIBUTION; STATISTICS; TURBULENCE