Statistics – Applications
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh11c1120v&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH11C-1120
Statistics
Applications
0654 Plasmas, 2104 Cosmic Rays, 2149 Mhd Waves And Turbulence, 7839 Nonlinear Phenomena, 7863 Turbulence
Scientific paper
Standard theory of energetic particle transport in magnetic irregularities focus on weak random fluctuations described as linear MHD wave modes and does not include non-linear coherent structures such as vortices. To address this shortcoming, a study of energetic particle diffusion in heliosphere with taking into account scattering on vortices is made. We consider vortices as nonlinear coherent planar structures orthogonal to the background magnetic field. They can be derived in the framework of nearly incompressible 2D MHD for a subsonic plasma in the fluid frame with finite plasma beta. Partial solutions which correspond to "zero-frequency" modes in the linear regime are obtained. These solutions take the form of vortices or convective cells in the nonlinear regime. Transport coefficients for energetic particles moving in a vortex field are evaluated using the Hamiltonian formalism and variational principles. Further applications for study of cosmic ray transport in the heliosphere are discussed.
Leroux J. A.
Verkhoglyadova Olga P.
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