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Abstract

The absorption of power is studied with fluid and gyrokinetic plasma models, when Alfven resonance provide for a weak damping in a partially standing wave field. Examples chosen in slab and toroidal geometry show that the fluid predictions based on resonance absorption are generally very different from the Landau damping of mode-converted slow waves. They, in particular, suggest that the continuum damping of toroidal Alfven eigenmodes (TAE) and the power deposition profiles obtained in the ion-cyclotron range of frequencies (ICRF) using fluid plasma models can be very misleading.

Additional information

Authors: JUAN A, Centre de Recherches en Physique des Plasmas, EURATOM Association-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (CH);APPERT K, Centre de Recherches en Physique des Plasmas, EURATOM Association-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (CH);HELLSTEN T, Centre de Recherches en Physique des Plasmas, EURATOM Association-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (CH);VACLAVIK J, Alfen Laboratory, Stockholm (SE);VILLARD L, Alfen Laboratory, Stockholm (SE)
Bibliographic Reference: An article published in: Physics of Plasmas. Vol.5, No.11, (1998) pp.3801-3805
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