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Title: Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence

Fluctuation-induced E × B shear flow and energy transfer for plasma interchange turbulence are examined in a flux-driven system with both closed and open magnetic field lines. The nonlinear evolution of interchange turbulence shows the presence of two confinement regimes characterized by low and high E × B flow shear. In the first regime, the large-scale turbulent convection is dominant and the mean E × B shear flow is at a relatively low level. By increasing the heat flux above a certain threshold, the increased turbulent intensity gives rise to the transfer of energy from fluctuations to mean E × B flows. As a result, a transition to the second regime occurs, in which a strong mean E × B shear flow is generated.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [3]
  1. School of Physics, State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
  2. (United States)
  3. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
22489837
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; CONVECTION; ELECTRIC FIELDS; FLUCTUATIONS; HEAT FLUX; MAGNETIC FIELDS; NONLINEAR PROBLEMS; PLASMA; PLASMA CONFINEMENT; SHEAR; TURBULENCE