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EP: Fachverband Extraterrestrische Physik

EP 13: Astrophysics II

EP 13.2: Vortrag

Donnerstag, 18. März 2010, 14:15–14:30, AKM

The Anisotropic Diffusion Tensor for an Arbitrary Magnetic Field — •Stephan Barra, Frederic Effenberger, Horst Fichtner, and Klaus Scherer — Institut für theoretische Physik IV, Ruhr-Univerität Bochum

Anisotropic diffusion is used to describe the transport of energetic particles in the solar wind, like electrons from jupiter. It should, however, also be applied to the transport of cosmic rays through the galaxy and its magnetic field. Because the detailed pattern of the Milky Way's magnetic field is still under discussion, one has to explore the related structure of the anisotropic spatial diffusion tensor for an arbitrary magnetic field. Neglecting particle drifts, this tensor has diagonal form in a local reference frame with respect to the magnetic field and has to be transformed into a global frame. Results from a mathematically rigorous derivation will be illustrated and compared to previously used forms.