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P: Fachverband Plasmaphysik
P 7: Theorie/Modellierung I
P 7.6: Talk
Tuesday, March 31, 2009, 14:30–14:45, HS Biochemie (groß)
Microturbulence in Astrophysical and Fusion Plasmas — •Moritz J. Pueschel1, Thilo Hauff1, Frank Jenko1, and Harald Lesch2 — 1Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany — 2University Observatory Munich, D-81679 Munich, Germany
Anomalous (turbulent) transport is the dominant heat transfer causing process in fusion core plasmas. Here, (gyro-)kinetic simulations have yielded good descriptions of multiple features of turbulence. This framework can be applied to astrophysical scales, as well, with no or few modifications. In this work, we employ the gyrokinetic electromagnetic code Gene to calculate turbulent heat fluxes due to plasma microturbulence. These results are then applied to the cooling flow problem where magnetic fields are believed to impair heat exchange between regions of different temperature; microturbulent transport in these systems can exceed conductive values significantly. On the base of gyrokinetic fusion plasma investigations, conclusions are drawn concerning different parameter regimes. In a separate investigation, the behavior and effects of energetic particles in turbulent electromagnetic fields are studied, applying fusion plasma knowledge to the interaction of cosmic particles with the solar wind. The movement of solar and cosmic particles through the solar system is not yet fully understood, and turbulent interactions might play an important role in cross-field transport.