SMuK 2023 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 11: Poster I
P 11.37: Poster
Mittwoch, 22. März 2023, 14:00–15:30, HSZ EG
Towards Laboratory Astrophysics in Wakefield Accelerators — •Erwin Walter1, John P. Farmer2, Martin S. Weidl1, Patric Muggli2, and Frank Jenko1 — 1Max Planck Institute for Plasma Physics, 85748 Garching, Germany — 2Max Planck Institute for Physics, 80805 Munich, Germany
From supernovae in distant galaxies to wakefield accelerators in laboratories, the interaction of relativistic particles with plasma is relevant to many physical scales. The electromagnetically dominant current filamentation instability (CFI), which transversely breaks the beam into narrow filaments, may generate a sufficiently strong magnetic field to form collisionless shocks. By changing the operating parameters of beam-driven wakefield accelerators, it may be possible to access this regime relevant to astrophysics.
Due to the large difference in scales, numerical studies with quasistatic particle-in-cell (PIC) methods greatly reduce computational overhead compared to fully electromagnetic PIC. A quasineutral fireball beam consisting of positrons and electrons is simulated to determine to what extent the physics of CFI can be modelled by quasistatic codes and how different numerical methods affect the instability.
This work potentially paves the way to provide insight into analogous astrophysical scenarios in a laboratory setup.