Effect of proton-amplified waves on the evolution of solar energetic particle composition in gradual events

Authors
Ng, CK Reames, DV Tylka, AJ
Citation
Ck. Ng et al., Effect of proton-amplified waves on the evolution of solar energetic particle composition in gradual events, GEOPHYS R L, 26(14), 1999, pp. 2145-2148
Citations number
14
Categorie Soggetti
Earth Sciences
Journal title
GEOPHYSICAL RESEARCH LETTERS
ISSN journal
00948276 → ACNP
Volume
26
Issue
14
Year of publication
1999
Pages
2145 - 2148
Database
ISI
SICI code
0094-8276(19990715)26:14<2145:EOPWOT>2.0.ZU;2-2
Abstract
We present a model of the coupled evolution of energetic ions and Alfven wa ves, incorporating magnetic focusing, pitch-angle diffusion, wave amplifica tion, and a traveling ion source. Ion transport through proton-amplified wa ves with non-Kolmogorov spectra produces the contrasting three-stage evolut ion of Fe/O and He/H ratios at several MeV/amu observed by Wind/EPACT in th e 20 April 1998 gradual solar energetic particle event [Tylka et al., 1999] .