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Title: Up-gradient particle flux in a drift wave-zonal flow system

We report a net inward, up-gradient turbulent particle flux in a cylindrical plasma when collisional drift waves generate a sufficiently strong sheared azimuthal flow that drives positive (negative) density fluctuations up (down) the background density gradient, resulting in a steepening of the mean density gradient. The results show the existence of a saturation mechanism for drift-turbulence driven sheared flows that can cause up-gradient particle transport and density profile steepening.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. Center for Momentum Transport and Flow Organization, UC San Diego, La Jolla, California 92093 (United States)
  2. (United States)
  3. (CASS) and Department of Physics, UC San Diego, La Jolla, California 92093 (United States)
  4. Center for Energy Research, UC San Diego, La Jolla, California 92093 (United States)
Publication Date:
OSTI Identifier:
22410280
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CYLINDRICAL CONFIGURATION; FLOW MODELS; FLUCTUATIONS; PLASMA; PLASMA DENSITY; SHEAR; TURBULENCE; WAVE PROPAGATION