Erlangen 2026 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 2: Astrophysical Plasmas
P 2.3: Vortrag
Montag, 16. März 2026, 15:35–15:50, KH 01.020
Particle acceleration at oblique high-Mach-Number shocks propagating in a turbulent medium — •Eloise Moore1, Karol Fulat2, Mahmoud Al-Awashra3, Michelle Tsirou3, and Martin Pohl1,3 — 1Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam, Germany — 2Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA — 3Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany
Astrophysical collisionless shocks are efficient particle accelerators that require some pre-acceleration mechanism in order for electrons to participate in diffusive shock acceleration. The particle-in-cell (PIC) method provides a kinetic description of a system from first principles of collisionless plasma. Using the PIC code, THATMPI, we perform novel simulations of oblique non-relativistic high-Mach-number shocks propagating into an upstream containing pre-existing decaying turbulence. Such turbulence consists of perturbations in the magnetic field varying in amplitude, and a self-consistent current driven by the ions to limit the phase speed to low levels. We investigate the role of turbulence in modifying the shock structure, plasma instabilities and ultimately particle acceleration, by comparing our results to simulations with a homogeneous upstream.
Keywords: Particle Acceleration; Turbulence; Shocks