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P: Fachverband Plasmaphysik

P 14: Low Pressure Plasmas and their Application I

P 14.4: Talk

Wednesday, February 28, 2024, 12:00–12:15, WW 1: HS

Simulation and Modeling of DC Glow Discharges — •Tim Bolles¹, Maximilian Klich¹, Katharina Nösges¹, Máté Vass^1,2, and Thomas Mussenbrock¹ — ¹Ruhr University Bochum, 44780 Bochum, Germany — ²Wigner Research Centre for Physics, 1121 Budapest, Hungary

DC (Direct Current) discharges are well established systems with extensive applications, particularly in the high gas pressure regime. Their physics is more complex than initially assumed. The reason for this is that they are very sensitive to external conditions and internal fluctuations such as the plasma density or the electron temperature. The simulation of DC discharges, especially if kinetic effects need to be considered, can be rather complex, as it needs to accurately capture the variable and often unstable properties of the discharge. Kinetic models, which consider the movements and interactions of individual particles within the plasma, must be able to handle these instabilities and fluctuations, presenting a significant challenge. This contribution focuses on addressing the complexities in the kinetic simulation of DC discharges, outlining the challenges and proposing solutions. Specifically, it will illustrate the indispensable elements of a kinetic simulation model for DC discharges, as demonstrated through a case study. Valuable discussions with Zoltan Donko (Wigner Research Center for Physics) are gratefully acknowledged.

Keywords: Niederdruckplasmen; DC Plasma; DC glow discharge; particle-in-cell / Monte Carlo collision; Simulation