Physics
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..374..461m&link_type=abstract
High energy solar physics. AIP Conference Proceedings, Volume 374, pp. 461-478 (1996).
Physics
4
Waves, Oscillations, And Instabilities In Plasmas And Intense Beams
Scientific paper
The heavy element composition anomalies systematically found in the impulsive, 3He-rich, solar energetic particles events are reviewed. These anomalies imply, in a quasi-model-independent way, that the particles are accelerated predominantly out of gases with temperatures in the ~2.5 to ~5 MK range, i.e., typical active region, not flaring loop, temperatures. Existing models for selective ion acceleration by plasma waves are briefly overviewed. A specific model to account for the heavy element enhancements is presented, in terms of the damping of electromagnetic He cyclotron waves by interaction with 4He ions, which sets constraints to the source gas temperature and to the acceptable rate of wave cascading. The high charge states observed among the energetic particles are discussed.
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