Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh41a1901f&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH41A-1901
Physics
Plasma Physics
[7514] Solar Physics, Astrophysics, And Astronomy / Energetic Particles, [7859] Space Plasma Physics / Transport Processes, [7863] Space Plasma Physics / Turbulence
Scientific paper
We present test-particle simulations to investigate the temporal dependence of the two-point correlation function for the velocity of charged particles scattering in a static fluctuating magnetic field. The TGK formalism is used to compute the coefficients of diffusion parallel and perpendicular to the average magnetic field for a three-dimensional isotropic turbulence with parameters of solar wind turbulence at 1 AU. The decorrelation times for parallel and perpendicular motions are estimated including the drift of the particles from the local magnetic field line. The regimes of strong and weak magnetic turbulence are compared and discussed. We extend the particle energy range from 100 keV up to 100 GeV. We discuss implications for the prediction of the early-time instantaneous perpendicular coefficient diffusion and for the interpretation of the longitudinal spread observed in solar energetic particles events. We will also discuss the particle transport in GLE events.
Fraschetti Federico
Giacalone Joe
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