Stuttgart 2012 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 14: Poster Sonne und Heliosphäre
EP 14.4: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.V
A stochastic approach to heliospheric propagation — •Andreas Kopp1,2, Roelf Du Toit Strauss2, Ingo Büsching3,2, and Marius S. Potgieter2 — 1IEAP, Christian-Albrechts-Universität zu Kiel, Leibnizstrasse 11, 24118 Kiel, Germany — 2Centre for Space Research, North-West University, Potchefstroom, 2520, South Africa — 3Theoretische Physik, Lehrstuhl IV, Ruhr-Universität Bochum, 44780 Bochum, Germany
A newly developed numerical code is presented that solves general Fokker-Planck type transport equations by means of stochastic differential equations (SDEs) in four dimensions (space and momentum) and time. Besides propagation the code is capable of describing the full diffusion tensor as well as particle sources and linear loss terms. The approach was to design the code very general and flexible, so that it can be applied to a large variety of physical problems. Adaption to graphics cards within the CUDA framework significantly improves the performance. Here, we present applications to the propagation of energetic particles, in particular to Jovian electrons, in the heliosphere. Our results can be shown to be consistent with previous models and, moreover, to provide additional informations not accessible for traditional finite-difference approaches.