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<dc:title xml:lang="fr">Etude mathématique et numérique d'un modèle gyrocinétique incluant des effets électromagnétiques pour la simulation d'un plasma de Tokamak</dc:title>
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<dcterms:abstract xml:lang="fr">Cette thèse propose différentes méthodes théoriques et numériques pour simuler à coût réduit le comportement des plasmas ou des faisceaux de particules chargées sous l’action d’un champ magnétique fort. Outre le champ magnétique externe, chaque particule est soumise à champ électromagnétique créé par les particules elles-mêmes. Dans les modèles cinétiques, les particules sont représentées par une fonction de distribution f(x,v,t) qui vérifie l’équation de Vlasov. Afin de déterminer le champ électromagnétique, cette équation est couplée aux équations de Maxwell ou de Poisson. L’aspect champ magnétique fort est alors pris en compte par un dimensionnement adéquat qui fait apparaître un paramètre de perturbation singulière 1/ε.</dcterms:abstract>
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