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Title: A new continuum approach for nonlinear kinetic simulation and transport analysis

A numerical code based on the I-transform approach is developed to solve the nonlinear Vlasov equation and carry out the transport analysis. The numerical results given by the I-transform approach agree with the conservative semi-Lagrangian approach in the Landau damping case and the bump-on-tail instability case. The diffusivities induced by the random fields and the quasilinear transport are also successfully demonstrated by using the new approach. It is found that the nonlinear transport in the one-dimensional Langmuir turbulence cannot be well-described by a simple diffusion model, due to the strong particle trapping at the nonlinear stage.
Authors:
;  [1] ; ; ;  [2]
  1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)
  2. Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031 (China)
Publication Date:
OSTI Identifier:
22408084
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; 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; BOLTZMANN-VLASOV EQUATION; DIFFUSION; KINETIC EQUATIONS; LAGRANGIAN FUNCTION; LANDAU DAMPING; LANGMUIR FREQUENCY; NONLINEAR PROBLEMS; ONE-DIMENSIONAL CALCULATIONS; TRANSPORT THEORY; TRAPPING; TURBULENCE