Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh43d..01b&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH43D-01
Physics
Plasma Physics
[7863] Space Plasma Physics / Turbulence
Scientific paper
We discuss the spectral structure of parallel electric field fluctuations produced by Alfvenic turbulence in relation to particle acceleration and cross-field transport in solar wind plasma conditions. Based on the simplest truncation of the electromagnetic gyrofluid equations in a homogeneous plasma, a model for the energy cascade produced by strong anisotropic Alfvenic turbulence is constructed. It smoothly connects the large magnetohydrodynamics (MHD) scales and the small dispersive scales. Scaling relations are obtained for the parallel electric field fluctuations, as a function of perpendicular and parallel wavenumbers. The reason is the potential implication of this parallel electric field in turbulent acceleration and transport, an issue raised some time ago in [A. Hasegawa, K. Mima, J. Geophys. Res. 83, 1117 (1978)]. The possibility of measurement of this electric field component in the solar wind will be discussed.
Bian Nicolas
Kontar Eduard P.
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