Gyrokinetic Simulations of Solar Wind Turbulence from Ion to Electron Scales
arXiv:1104.0877 · doi:10.1103/PhysRevLett.107.035004
Abstract
The first three-dimensional, nonlinear gyrokinetic simulation of plasma turbulence resolving scales from the ion to electron gyroradius with a realistic mass ratio is presented, where all damping is provided by resolved physical mechanisms. The resulting energy spectra are quantitatively consistent with a magnetic power spectrum scaling of as observed in \emph{in situ} spacecraft measurements of the "dissipation range" of solar wind turbulence. Despite the strongly nonlinear nature of the turbulence, the linear kinetic \Alfven wave mode quantitatively describes the polarization of the turbulent fluctuations. The collisional ion heating is measured at sub-ion-Larmor radius scales, which provides the first evidence of the ion entropy cascade in an electromagnetic turbulence simulation.
4 pages, 2 figures, submitted to Phys. Rev. Lett
References in corpus (3)
Cited by in corpus (109)
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