Bonn 2020 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 4: Sun and Heliosphere II
EP 4.4: Talk
Wednesday, April 1, 2020, 11:30–11:45, H-HS VIII
Charged particle transport in MHD simulations — •Felix Spanier1,2 and Alex Ivascenko2 — 1Institut für Theoretische Astrophysik, Universität Heidelberg — 2Centre for Space Research, North-West University, Potchefstroom, South Africa
Transport and acceleration of charged particles in turbulent media is a topic of great interest in space physics and interstellar astrophysics. These processes are dominated by the scattering of particles off magnetic irregularities. These irregularities are often described as plasma waves.
We report on incompressible MHD simulations combined with charged test particle simulations using the GISMO code. Here we describe a new method to derive the diffusion coefficients Dµµ and D⊥ from these numerical experiments which is applicable even in the case of strong turbulence where quasi-linear theory is no longer valid. Results for these parameters are presented where a special emphasis is on the transport characteristics at µ=0.