Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....8.3091k&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
3
Scientific paper
We compare the mean charge states of heavy ions (O, Ne, Mg, Si and Fe) as observed with ACE/SEPICA during several solar energetic particle events in 1998 with model calculations. A model of stochastic acceleration that includes a self-consistent treatment of the charge states of the affected ions is applied to estimate the plasma temperature in the acceleration site for 8 impulsive events. This model takes into account ionization due to collisions with electrons and heavy particles (protons and He) as well as recombination due to collisions with electrons. In general the temperatures obtained for Ne, Mg and Fe ions appear higher than those for O and Si. We briefly compare our results with the corresponding ionization temperatures for gradual events observed in previous solar cycles and in 1997-1998.
Kartavykh Yu.
Moebius Eberhard
Ostryakov V.
Popecki Mark
Ruffolo David
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