From kinetic MHD in stellarators to a fully kinetic description of wave particle interaction
- Max-Planck-Institut fuer Plasmaphysik, EURATOM-Association, Wendelsteinstr., D-17491 Greifswald (Germany)
- Rechenzentrum der Max-Planck-Gesellschaft und des Max-Planck-Institutes fuer Plasmaphysik EURATOM-Association, Boltzmannstr. 2, D-85748 Garching (Germany)
We use a linearized model of kinetic MHD for the perturbative calculation of growth rates of Alfven eigenmodes.The numerical model, a code called CAS3D-K, is based on the three-dimensional ideal MHD stability code CAS3D and a numeric solution of the drift kinetic equation which avoids approximations to the magnetic geometry but neglects the drifts of the particles away from the flux surface.The approach is used to discuss stability boundaries in W7-X and W7-AS and considers both, passing and reflected particles. The limits of the applicability of the model will be discussed as well.It will be shown that gyro-kinetic PIC codes offer a very promising way to improve the model. The two-dimensional linear PIC code GYGLES is used to calculate gyro-kinetic counterparts of ideal MHD modes in cylindrical and in tokamak geometry.
- OSTI ID:
- 21251729
- Journal Information:
- AIP Conference Proceedings, Vol. 1069, Issue 1; Conference: Joint Varenna-Lausanne international workshop on theory of fusion plasmas, Varenna (Italy), 25-29 Aug 2008; Other Information: DOI: 10.1063/1.3033696; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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APPROXIMATIONS
C CODES
CYLINDRICAL CONFIGURATION
HYDROMAGNETIC WAVES
KINETIC EQUATIONS
MAGNETIC SURFACES
MAGNETOHYDRODYNAMICS
MICROWAVE AMPLIFIERS
NUMERICAL ANALYSIS
THREE-DIMENSIONAL CALCULATIONS
TOKAMAK DEVICES
TWO-DIMENSIONAL CALCULATIONS
WENDELSTEIN-7 STELLARATOR