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Title: Electromagnetic global gyrokinetic simulation of shear Alfven wave dynamics in tokamak plasmas

Abstract

Electromagnetic gyrokinetic simulation in toroidal geometry is developed based on a fluid-kinetic hybrid electron model. The Alfven wave propagation in a fully global gyrokinetic particle simulation is investigated. In the long-wavelength magnetohydrodynamic limit, shear Alfven wave oscillations, continuum damping, and the appearance of the frequency gap in toroidal geometries are demonstrated. Wave propagation across the magnetic field (kinetic Alfven wave) is examined by comparing the simulation results with the theoretical dispersion relation. Furthermore, finite-beta stabilization of the ion temperature gradient mode and the onset of the kinetic ballooning mode are demonstrated.

Authors:
; ;  [1];  [2]
  1. Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20974932
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 4; Other Information: DOI: 10.1063/1.2718908; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; BALLOONING INSTABILITY; DAMPING; DISPERSION RELATIONS; ELECTRON TEMPERATURE; ELECTRONS; GEOMETRY; ION TEMPERATURE; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA CONFINEMENT; PLASMA SIMULATION; PLASMA WAVES; SHEAR; TEMPERATURE GRADIENTS; TOKAMAK DEVICES; WAVE PROPAGATION

Citation Formats

Nishimura, Y., Lin, Z., Wang, W. X., and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Electromagnetic global gyrokinetic simulation of shear Alfven wave dynamics in tokamak plasmas. United States: N. p., 2007. Web. doi:10.1063/1.2718908.
Nishimura, Y., Lin, Z., Wang, W. X., & Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Electromagnetic global gyrokinetic simulation of shear Alfven wave dynamics in tokamak plasmas. United States. doi:10.1063/1.2718908.
Nishimura, Y., Lin, Z., Wang, W. X., and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Sun . "Electromagnetic global gyrokinetic simulation of shear Alfven wave dynamics in tokamak plasmas". United States. doi:10.1063/1.2718908.
@article{osti_20974932,
title = {Electromagnetic global gyrokinetic simulation of shear Alfven wave dynamics in tokamak plasmas},
author = {Nishimura, Y. and Lin, Z. and Wang, W. X. and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543},
abstractNote = {Electromagnetic gyrokinetic simulation in toroidal geometry is developed based on a fluid-kinetic hybrid electron model. The Alfven wave propagation in a fully global gyrokinetic particle simulation is investigated. In the long-wavelength magnetohydrodynamic limit, shear Alfven wave oscillations, continuum damping, and the appearance of the frequency gap in toroidal geometries are demonstrated. Wave propagation across the magnetic field (kinetic Alfven wave) is examined by comparing the simulation results with the theoretical dispersion relation. Furthermore, finite-beta stabilization of the ion temperature gradient mode and the onset of the kinetic ballooning mode are demonstrated.},
doi = {10.1063/1.2718908},
journal = {Physics of Plasmas},
number = 4,
volume = 14,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}