Kinetic-Fluid Model for Modeling Fast Ion Driven Instabilities

Details Kinetic-Fluid Model for Modeling Fast Ion Driven Instabilities Kinetic-Fluid Model for Modeling Fast Ion Driven Instabilities

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dppco1011c&link_type=abstract

American Physical Society, 45th Annual Meeting of the Division of Plasma Physics, October 27-31, 2003, Albuquerque, New Mexico,

Physics

Plasma Physics

Scientific paper

It is has been shown that, in addition to the fast ion kinetic effects, thermal particle kinetic effects such as finite ion gyroradii and Landau damping are important in determining the stability of fast ion driven modes and must be treated non-perturbatively. Moreover, due to complex magnetic field geometries, it is desirable to employ single fluid equations to properly model the geometrical effects. To accommodate these requirements, we have developed a kinetic-fluid model for modeling fast ion driving modes in high-beta plasmas with multiple ion species. The model consists of single-MHD fluid equations coupled with kinetic (gyrokinetic or full Vlasov) descriptions for all particle species. In the linear limit, we will show that the kinetic-fluid model properly retains key physics of both thermal and energetic particles for describing fast ion driven instabilities. For tokamaks we will present a formulation for calculating linear stability, which allows a natural extension from the present version of NOVA-K and NOVA-2 codes. In the nonlinear limit, the model allows a natural extension of the previously developed kinetic-MHD simulation codes to include thermal particle kinetic physics.

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