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Effect of proton‐amplified waves on the evolution of solar energetic particle composition in gradual events
Author(s) -
Ng Chee K.,
Reames Donald V.,
Tylka Allan J.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900459
Subject(s) - proton , physics , solar wind , ion , particle (ecology) , diffusion , particle acceleration , spectral line , solar energetic particles , wave–particle duality , computational physics , event (particle physics) , atomic physics , astrophysics , nuclear physics , electron , plasma , astronomy , coronal mass ejection , geology , oceanography , quantum mechanics , thermodynamics
We present a model of the coupled evolution of energetic ions and Alfvén waves, incorporating magnetic focusing, pitch‐angle diffusion, wave amplification, and a traveling ion source. Ion transport through proton‐amplified waves with non‐Kolmogorov spectra produces the contrasting three‐stage evolution of Fe/O and He/H ratios at several MeV/amu observed by Wind/EPACT in the 20 April 1998 gradual solar energetic particle event [ Tylka et al. , 1999].