Greifswald 2009 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Poster: Theorie/Modellierung

P 18.12: Poster

Mittwoch, 1. April 2009, 17:30–19:30, Foyer des IfP

Numerical study of the interaction between Alfvén waves and fast particles — •Tamás Béla Fehér, Axel Könies, Ralf Kleiber, and Roman Hatzky — Max-Planck-Institut für Plasmaphysik, Greifswald, Germany

Alfvén waves are commonly observed in tokamak and stellarator plasmas. There are weakly damped Alfén eigenmodes which can become unstable by interaction with fast particles.

A hybrid approach i.e. a model combining fluid and kinetic parts is used to describe the wave-particle interaction in stellarator plasmas. Linearized reduced MHD equations with kinetic effects are used to describe the wave field. The particles are followed with the gyrokinetic PIC code EUTERPE. This approach aims at calculating the growth rate of the instability from the energy transfer between the particles and the wave, avoiding any approximations of the guiding center orbits.