Heavy Ion and Electron Release Times in Solar Particle Events

Creators: Mewaldt, R. A.; Cohen, C. M. S.; Haggerty, D. K.; Gold, R. E.; Krimigis, S. M.; Leske, R. A.; Ogliore, R. C.; Roelof, E. C.; Stone, E. C.; von Rosenvinge, T. T.; Wiedenbeck, M. E.

Others:: Kajita, Takaaki; Asaoka, Y.; Kawachi, A.; Matsubara, Y.; Sasaki, M.

Abstract

Using data from the SIS and EPAM instruments on ACE we have measured the onset times of 6 - 88 MeV/nuc ions and 38 - 315 keV electrons in 11 solar energetic particle (SEP) events from 1997 through 2002. We find that heavy ions are generally released later than electrons, by as much as ∼50 minutes. There is an apparent correlation between the release times (and the inferred release distances) and the 3He/4He ratio.

Additional Information

Copyright Universal Academy Press Inc. Supported by NASA at Caltech (under grants NAG5- 6912 and NAG5-12929), APL, JPL, and GSFC.

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