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P: Fachverband Plasmaphysik

P 20: Poster Session- Low Temperature Plasmas

P 20.7: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

Quantum Kinetic Approach to transport at the plasma interface* — Karsten Balzer¹ and •Michael Bonitz² — ¹Rechenzentrum der CAU Kiel — ²Institut für Theoretische Physik und Astrophysik, CAU Kiel

For an accurate treatement of plasma-wall interaction in low-temperature plasmas and the associated transport of charge, momentum and energy, the behavior of nonequilibrium electrons and ions at the wall is crucial. This requires to go beyond the traditional empirical approach to charged particle sticking and secondary electron emission as demonstrated in [1]. Here we outline a selfconsistent kinetic approach that will, eventually, allow to combine classical kinetic theory in the plasma and quantum kinetic theory inside the solid. As a first application we present quantum kinetic results for the stopping power of protons in a graphene-type layer. We use nonequilibrium Green functions [2, 3] and dynamical mean field theory to properly treat electronic correlations. Good agreement is observed with available TRIM simulations, for weak coupling. In contrast, for strongly coupled materials deviations are observed [4]. 1) F.X. Bronold and H. Fehske, Phys. Rev. Lett. 115, 225001 (2015). 2) M. Bonitz, Quantum Kinetic Theory, 2nd ed. Springer 2015. 3) K. Balzer, and M. Bonitz, Nonequilibrium Green’s Functions Approach to Inhomogeneous Systems, Lecture Notes in Physics, Springer, vol. 867 (2013). 4) K. Balzer, and M. Bonitz, submitted for publication (2016)
^*Part of the Kiel research initiative “The Plasma Interface”