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Title: Ion finite Larmor radius effects on the interchange instability in an open system

A particle simulation of an interchange instability was performed by taking into account the ion finite Larmor radius (FLR) effects. It is found that the interchange instability with large FLR grows in two phases, that is, linearly growing phase and the nonlinear phase subsequent to the linear phase, where the instability grows exponentially in both phases. The linear growth rates observed in the simulation agree well with the theoretical calculation. The effects of FLR are usually taken in the fluid simulation through the gyroviscosity, the effects of which are verified in the particle simulation with large FLR regime. The gyroviscous cancellation phenomenon observed in the particle simulation causes the drifts in the direction of ion diamagnetic drifts.
Authors:
; ; ; ;  [1]
  1. Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)
Publication Date:
OSTI Identifier:
22218407
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 © 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; FLUIDS; FLUTE INSTABILITY; IONS; LARMOR RADIUS; NONLINEAR PROBLEMS; PLASMA; PLASMA DIAMAGNETISM; PLASMA DRIFT; PLASMA FLUID EQUATIONS; PLASMA SIMULATION