Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh41b0471s&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH41B-0471
Physics
2114 Energetic Particles, Heliospheric (7514), 2149 Mhd Waves And Turbulence, 2164 Solar Wind Plasma, 7867 Wave/Particle Interactions
Scientific paper
As a result of cyclotron interaction with Alfven waves propagating from the sun, pitch angle diffusion of resonant particles takes place and shell-like distribution function of resonant ions (protons) is formed at each distance from the sun [V. Galinsky and V. Shevchenko, Phys. Rev. Lett., 85, 90, 2000]. Stability of the solar wind ion shell-like distribution function with respect to excitation of waves at larger distances is addressed. It is shown in linear approximation, that in case when the phase velocity of Alfven waves decreases with distance, ions with shell distribution excite outward propagating Alfven waves with smaller phase velocities when they advance to larger distances. The real problem, how the shell distribution, created at some distance from the sun, is changed due to interaction with Alfven fluctuations with smaller phase velocities at larger distances in the divergent solar wind, is studied in quasi-linear approximation and by numerical simulations.
Galinsky V. L.
Sagdeev Roal'd. Z.
Shevchenko V. I.
Winske Dan
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