Abstract
The 3-D Plasma and Energetic Particles (3DP) instruments on the WIND spacecraft are providing new insights on the origin of solar energetic particles. In this paper, recent results on the solar origin of 1-300 keV electrons and 0.1-6 MeV protons are reviewed. The main findings are that one class of electron events escaping into interplanetary space are related to the impulsive phase of the flare (radio type III burst related events), but there is also a second class of events released after the impulsive phase of the flare that is possibly related to coronal shocks. In two thirds of all proton events, low energy protons (<6 MeV) are released roughly an hour later than the electrons and are most likely accelerated at the shock fronts of coronal mass ejections. The remaining third of proton events show a puzzling velocity dispersion that could be explained by a non-simultaneous release of protons at different energy.
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Krucker, S. (2003). On the Origin of Solar Energetic Particle Events. In: Klein, KL. (eds) Energy Conversion and Particle Acceleration in the Solar Corona. Lecture Notes in Physics, vol 612. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36242-8_11
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DOI: https://doi.org/10.1007/3-540-36242-8_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-00275-8
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