Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..140...99s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 140, no. 1, July 1992, p. 99-119.
Physics
11
Current Sheets, Electromagnetic Fields, Particle Acceleration, Solar Flares, Solar Magnetic Field, Electron Energy, Magnetohydrodynamic Flow, Proton Energy
Scientific paper
A model is presented for high-energy solar flares to explain prompt proton and electron acceleration, which occurs around moving X-point magnetic fields during the implosion phase of the current sheet. The electromagnetic fields are calculated for the period during the strong implosion of the current sheet, which is driven by the converging flow toward the center of the magnetic arcade. A test particle motion in the strong electromagnetic fields derived from the MHD equations is studied. It is shown that both protons and electrons can be promptly (within 1 s) accelerated to about 70 and 200 MeV, respectively. This acceleration mechanism can be applicable for the impulsive phase of the gradual gamma-ray and proton flares (gradual GR/P flare), which have been called two-ribbon flares.
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