First-order Fermi shock acceleration in solar flares |
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| Authors: | DC Ellison R Ramaty |
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| Institution: | 1. Astronomy Program, University of Maryland, College Park, MD 20742, USA;7. Laboratory for High-Energy Astrophysics, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA |
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| Abstract: | First order Fermi shock acceleration of electrons, protons and alpha particles is compared to observations of energetic particle events. For each event, a unique shock compression ratio produces spectra in good agreement with observation. The simple model predicts that the acceleration time to a given energy will be approximately equal for electrons and protons and, for reasonable solar parameters, can be less than 1 second to ～ 100 MeV. |
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