SMuK 2023 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 8: Sun and heliosphere III

EP 8.4: Vortrag

Mittwoch, 22. März 2023, 17:00–17:15, ZEU/0160

The effect of kinetic turbulence on particle transport — •Felix Spanier — Institut für Theoretische Astrophysik, Universität Heidelberg

The transport of energetic charged particles depends on the underlying turbulence. Commonly non-dispersive waves and associated turbulence models (Kolmogorov or in some cases Goldreich-Sridhar) are used in modeling transport parameters. For frequencies close to and beyond the ion-gyrofrequency these assumptions are not applicable anymore.

We have used MHD as well as Particle-in-Cell simulations to study the difference between transport of particles in non-dispersive fluid and dispersive kinetic models. We will focus specifically on the transport of particles moving perpendicular to the magnetic field. The results are specifically interesting for the diffusion of electrons and positrons which resonate with waves with frequencies beyond the ion gyrofrequency.