Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

EP: Fachverband Extraterrestrische Physik

EP 4: Poster Session

EP 4.40: Poster

Dienstag, 26. Februar 2013, 11:15–12:45, Poster OG

Particle scattering at amplified wavemodes within the heliosphere — •Sebastian Lange¹, Felix Spanier¹, and Rami Vainio² — ¹Lehrstuhl für Astronomie, Universität Würzburg, Emil-Fischer-Straße 31, D-97074 Würzburg — ²Department of Physics, P.O.Box 64, 00014 University of Helsinki, Finland

Coronal mass ejections and flares are most likely the accelerators of high-energy particles. Streaming particles up to GeV energy causing plasma instabilities within the heliosphere. This leads to amplified wavemodes which influence the turbulent evolution and hence the particle scattering significantly. To investigate these effects, we use a hybrid simulation code called Gismo, which treats the heliospheric turbulence by an incompressible magnetohydrodynamic appoach separately from a kinetic particle description. In this talk, we present results of particle scattering within turbulence by using conditions observed at three solar radii. Furthermore, simulations of particle scattering at amplified wavemodes will be shown. These numerical results are compared to a semi-analytical approach using quasilinear theory. Differences and problems in these models will be discussed to achieve a fundamental understanding of wave-particle interactions.