Physics – Plasma Physics
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3817110z&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 17, CiteID L17110
Physics
Plasma Physics
1
Magnetospheric Physics: Magnetotail, Nonlinear Geophysics: Nonlinear Maps, Nonlinear Geophysics: Turbulence (3379, 4568, 7863), Space Plasma Physics: Charged Particle Motion And Acceleration
Scientific paper
We studied the role of intermittency in the process of acceleration and transport of charged particles by electromagnetic turbulence. We propose a simple model of electromagnetic turbulence with a variable level of intermittency. The magnetic field is described as a superposition of an ensemble of magnetostatic plane waves and of spatially localized dynamic magnetic clouds. The amplitudes of magnetic clouds are distributed according to an intermittent map. The model approximates essential properties of turbulence observed ‘in situ’ in the neutral plane of the Earth's magnetotail. Numerical integration of charged particle trajectories in such a dynamic electromagnetic environment shows that, for the fixed time interval, the higher the level of intermittency, the higher the energy gain. Moreover, in a sufficiently intermittent turbulence, particle acceleration occurs without significant intensification of the spatial transport.
Artemyev A. V.
Petrukovich A. A.
Rybalko S. D.
Zelenyi Lev M.
Zimbardo Gaetano
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