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Collisions in magnetised plasmas
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Journal Article
Collisions in magnetised plasmas
2015
Overview
Approximations for closing the kinetic equation for the one particle distribution function are calculated by using propagators. These provide the formal structure of the collision term in the Landau approximation. The method allows one to investigate the effect of inhomogeneities at the Debye scale and to analyse magnetised collisions, when the Larmor radius is smaller than the Debye length. This method also allows one developing a simple renormalisation scheme to derive the Lenard-Balescu collision operator.
Une méthode de propagateurs est utilisée pour fermer l’équation cinétique de la fonction de distribution à une particule. Celle-ci donne accès à la structure formelle de l’opérateur de collision dans l’approximation de Landau. Elle permet alors de calculer l’effet d’inhomogénéité à l’échelle de la longueur de Debye et d’analyser les collisions magnétisées, lorsque le rayon de Larmor est inférieur à la longueur de Debye. Cette méthode permet également de développer une méthode simple de renormalisation pour calculer l’opérateur de collision de Lenard-Balescu.
Publisher
EDP Sciences
Subject
