SMuK 2023 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 12: Poster II
P 12.37: Poster
Mittwoch, 22. März 2023, 17:30–19:00, HSZ EG
Simulation of electromagnetic turbulence in the stellarator W7-X — •Yann Narbutt, Aleksey Mischchenko, Alessandro Zocco, and Per Helander — Max Planck Institute for Plasma Physics, Wendelsteinstraße 1, 17489 Greifswald, Germany
Abstract. Fusion plasmas need high β=⟨ p⟩/(B2/2µ0), i.e. the ratio of plasma pressure to magnetic pressure. Going from low to high β first weakens ion-temperature-gradient mode activity and then causes strong kinetic-ballooning-mode (KBM) activity [1], with the latter being inherently electromagnetic. This can lead to particle and energy fluxes [2] which degrade plasma confinement. It is therefore of great importance to understand KBM turbulence for attaining high-performance plasmas. This poster presents first results of linear and non-linear simulations of KBM activity in the geometry of the stellarator Wendelstein 7-X using the global gyrokinetic code Euterpe [3].
References
[1] K. Aleynikova et al. "Kinetic ballooning modes in tokamaks and stellarators". In: Journal of Plasma Physics 84.6 (2018), p. 745840602. doi: 10.1017/S0022377818001186.
[2] A. Mishchenko et al. "Gyrokinetic particle-in-cell simulations of electromagnetic turbulence in the presence of fast particles and global modes". In: Plasma Physics and Controlled Fusion 64.10 (Sept. 2022), p. 104009. doi: 10.1088/1361-6587/ac8dbc.
[3] E. Sánchez et al. "Nonlinear gyrokinetic PIC simulations in stellarators with the code EUTERPE". In: Journal of Plasma Physics 86.5 (Sept. 2020). doi: 10.1017/s0022377820000926