Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 1: Helmholtz Graduate School I - Theory
P 1.1: Vortrag
Montag, 5. März 2018, 10:30–10:55, A 0.112
Fully kinetic simulations of kinetic-scale collisionless plasma turbulence — •Daniel Groselj1, Silvio Cerri2, Alejandro Banon Navarro1, Alfred Mallet3, Christopher Willmott4, Daniel Told1, Nuno Loureiro4, Francesco Califano5, and Frank Jenko1 — 1Max-Planck-Institut für Plasmaphysik, Garching, Germany — 2Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA — 3Space Science Center, University of New Hampshire, Durham, NH, USA — 4Plasma Science and Fusion Center, MIT, Cambridge, MA, USA — 5Physics Department “E. Fermi”, University of Pisa, Pisa, Italy
We present an overview of recent results obtained from a set of two- and three-dimensional, first-principles kinetic simulations of collisionless plasma turbulence with applications to the solar wind. The properties of the turbulence are compared against theoretical predictions as well as with results obtained from reduced-kinetic (gyrokinetic and hybrid-kinetic) simulations. The findings compare favorably against experimental measurements and demonstrate—from first physics principles—that the sub-ion-scale plasma turbulence under solar wind conditions is predominantly of kinetic Alfvén type. Furthermore, results from three-dimensional simulations show that the kinetic-scale turbulence naturally develops a scale-dependent anisotropy with respect to the local mean magnetic field, consistent with theoretical expectations for a so-called critically balanced kinetic Alfvén cascade.