Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh61b10l&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH61B-10
Physics
2118 Energetic Particles, Solar, 2139 Interplanetary Shocks, 7807 Charged Particle Motion And Acceleration
Scientific paper
An analytical theory is presented for the acceleration and transport of solar energetic ions at an evolving coronal/interplanetary shock driven by a coronal mass ejection. The calculations are based on the adiabatic assumption that the ion acceleration timescale is short compared with the evolutionary timescale of the shock. The theory includes the spherical geometry of the heliosphere, the diffusive shock acceleration of ions at the shock, the excitation of hydromagnetic waves by the energetic protons, and the transition from scatter-dominated transport of ions adjacent to the shock to nearly scatter-free transport in interplanetary space. New features of the theory, not previously presented, are the explicit inclusion of both the small ambient wave intensity in the solar wind and the self-consistent cutoff in the excited wave intensity at lower frequencies corresponding to the proton cutoff at higher energies. The theory includes predictions for all minor ions as well as protons. Presentations will be made of the ion energy spectra, the wave frequency spectrum as a function of distance from the shock, and ion intensity and anisotropy time profiles at Earth orbit. The time variations of the ion abundance ratios through the event will be emphasized.
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