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Gyrokinetic deltaf particle simulations of toroidicity-induced Alfvén eigenmode

Phys. Plasmas 16, 102101 (2009); doi:10.1063/1.3243493

Published 7 October 2009

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Jianying Lang,1 Yang Chen,1 Scott E. Parker,1 and Guo-Yong Fu2
1University of Colorado at Boulder, Boulder, Colorado 80309, USA
2Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
Gyrokinetic deltaf particle simulation is used to investigate toroidicity-induced Alfvén eigenmodes (TAEs). Both thermal ions and energetic particles are fully kinetic, but a reduced fluid model is used for the electrons. Simulation of a single n=2 global TAE is carefully analyzed and benchmarked with an eigenmode analysis, and a very good agreement is achieved in both mode structure and mode frequency. The instability of the mode in the presence of energetic particles is demonstrated. In particular, gyrokinetic simulations demonstrate the kinetic damping effect of thermal ions, where the finite radial structure of kinetic Alfvén waves is well resolved and the damping rate is compared to and found to agree well with analytical theory. ©2009 American Institute of Physics
History: Received 22 June 2009; accepted 14 September 2009; published 7 October 2009
Permalink: http://link.aip.org/link/?PHPAEN/16/102101/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.65.Tt
    Gyrofluid and gyrokinetic plasma simulations
  • 52.35.Hr
    Plasma electromagnetic waves
  • 52.55.Fa
    Tokamaks
  • 52.35.Py
    Plasma macroinstabilities (hydromagnetic)
  • YEAR: 2009

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ISSN:
1070-664X (print)   1089-7674 (online)
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