SMuK 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

P: Fachverband Plasmaphysik

P 12: Poster II

P 12.42: Poster

Mittwoch, 22. März 2023, 17:30–19:00, HSZ EG

Hybrid gyrokinetic simulations for weakly magnetized plasmas — •Sreenivasa chary Thatikonda, Felipe nathan De Oliveira lopes, Aleks Mustonen, Daniel Told, and Frank Jenko — Max planck institute for plasma physics, Garching, Germany

We aim to study instabilities, turbulence and reconnection phenomenon in weakly magnetized plasmas. Such conditions may found in natural plasmas such as the solar wind, but also in laboratory applications, e.g. in the edge of fusion plasmas. Due to steep gradients in the edge of fusion plasmas and high frequencies in space plasmas, the ordering assumptions of gyrokinetic theory (like low frequency or moderate gradients) may be challenged, particularly for ions. To overcome these limitations, the group derived equations for a hybrid model that includes fully kinetic physics for the ions, but gyrokinetic physics for the electrons. Thereby, only the slower ion gyration needs to be followed, while still benefitting from a faster treatment of the electrons and this approch also saves computation costs. The numerical implementation of the hybrid model for electrostatic version has been implemented into the existing simulation code ssV, ssV was developed initially at the department of Theoretical Physics I at RUB, Bochum. Semi-Lagrangian schemes (e.g. the PFC scheme) are employed in ssV. This approach tracks down characteristics from the mesh point backwards in time to get the new value of flutter. Ongoing work on ssV involves the addition of electromagnetic capabilities, which will enable application to space and astrophysical plasmas.