Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh71a..11l&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH71A-11
Physics
2114 Energetic Particles, Heliospheric (7514), 2149 Mhd Waves And Turbulence
Scientific paper
In recent years, accumulative evidence from nearly incompressible MHD theory, simulations, and solar wind observations pointed to the possibility of the strong presence of two-dimensional (2D) MHD turbulence in the solar wind. However, not much has been done to investigate theoretically the consequences of 2D turbulence for energetic particle transport. Within the framework of quasi-linear kinetic theory we will discuss the theoretical implications of 2D MHD turbulence for large-scale energetic charged particle transport in the heliosphere during quiet solar wind conditions. We will deal with two cases: (i) Anisotropic particle distributions where we will focus on pickup ion pitch angle scattering and stochastic acceleration in the quiet slow low-latitude solar wind, and (ii) near-isotropic particle distributions where we will discuss cosmic-ray transport in terms of spatial diffusion parallel and perpendicular to the large-scale magnetic field. The discussion will include topics such as the importance of turbulent motional electric field fluctuations for particle transport in the solar wind, and how a new kind of cosmic-ray transport equation arises when 2D turbulence is important for parallel diffusion.
le Roux Jakobus A.
Matthaeus William H.
Milano Leonardo J.
Zank Gary P.
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