SMuK 2021 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 9: Codes and Modelling (Methods)
P 9.3: Vortrag
Mittwoch, 1. September 2021, 17:00–17:15, H5
Two-part simulation approach of the source plasma of the KATRIN experiment — •Jonas Kellerer1 and Felix Spanier2 — 1Institut für Astroteilchenphysik, KIT, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany — 2Institut für Theoretische Astrophysik, Universität Heidelberg, Albert-Überle-Str. 2 und Philosophenweg 12, 69120 Heidelberg, Germany
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the effective neutrino mass through spectroscopy of gaseous Tritium β-decay. Those high energy β-decay electrons ionize the surrounding gas in the source and thus create a partly ionized plasma. The exterior experimental conditions generate unconventional plasma conditions resulting in a highly magnetized, partly collisional, multi-species, non-thermal (with thermal components), bound plasma. The combination of these properties make a self-contained analytical description impossible. Thus, we decided on a two-part iterative simulation approach: the slow ion physics will be covered by the newly developed Monte Carlo code KARL, which produces electron energy distributions and ion currents. The results of KARL will be used by a modified version of the well tested ACRONYM Particle in Cell code to resolve the fast electron-field interactions. The modifications include cylindrical boundaries and position dependent background currents and fields. The derived fields will in turn be used as input for the KARL code. In this presentation, key concepts and challenges of the iterative approach and the underlying codes will be presented.