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Title: Gyrokinetic simulations of collisionless reconnection in turbulent non-uniform plasmas

We present nonlinear gyrokinetic simulations of collisionless magnetic reconnection with non-uniformities in the plasma density, the electron temperature, and the ion temperature. The density gradient can stabilize reconnection due to diamagnetic effects but destabilize driftwave modes that produce turbulence. The electron temperature gradient triggers microtearing modes that drive rapid small-scale reconnection and strong electron heat transport. The ion temperature gradient destabilizes ion temperature gradient modes that, like the driftwaves, may enhance reconnection in some cases.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Laboratoire de Physique des Plasmas, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex (France)
  2. (United States)
  3. Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755 (United States)
  4. Graduate School of Simulation Studies, University of Hyogo, 7-1-28 Minatojima Minami-machi, Chuo-ku, Kobe, Hyogo 650-0047 (Japan)
Publication Date:
OSTI Identifier:
22253029
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 4; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON TEMPERATURE; ELECTRONS; HEAT TRANSFER; MAGNETIC RECONNECTION; NONLINEAR PROBLEMS; PLASMA DENSITY; PLASMA SIMULATION; TEMPERATURE GRADIENTS; TURBULENCE