Berlin 2014 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 20: Poster Session - Dusty Plasmas

P 20.9: Poster

Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer

Kielstream, a high-performance linear response program to study plasma wakefield effects — •Christopher Arran¹, Patrick Ludwig², and Michael Bonitz² — ¹Emmanuel College, Cambridge, UK — ²Institut für Theoretische Physik und Astrophysik, Universität Kiel, Germany

The challenging multiscale problem inherent to studying streaming complex plasmas can efficiently be tackled by a statistical ansatz for the light plasma constituents in combination with first-principle Langevin dynamics simulations of the heavy and strongly correlated dust component [1]. Of crucial importance in this scheme is the quality of the dynamically screened Coulomb potential [2]. For this purpose, we introduce Kielstream, an efficient Linear Response C++ program used for the high resolution computation of 3D plasma wake fields and the resulting electric fields. The optimization techniques used and the handling of competing numerical errors are discussed and results for the wake potential are presented for a wide range of Mach numbers and different electron to ion temperature ratios.[3]

This work is supported by the DFG via SFB-TR24, project A9 and by the DAAD RISE program.

[1] P. Ludwig et al., Plasma Phys. Contr. Fus. 54, 045011 (2012), [2] P. Ludwig et al., New J. Phys. 14, 053016 (2012), [3] P. Ludwig, C. Arran, and M. Bonitz, "Introduction to Streaming Complex Plasmas B: Theoretical Description of Wake Effects", in: "Complex Plasmas: Scientific Challenges and Technological Opportunities, M. Bonitz, K. Becker, J. Lopez and H. Thomsen [Eds.], Springer (2014)