<RESEARCH REPORT>PROMPT SIMULTANEOUS ACCELERATION OF PROTONS AND ELECTRONS TO RELATIVISTIC ENERGIES BY SHOCK WAVES IN SOLAR FLARES
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概要
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It is shown by theory and fully relativistic, electromagnetic particle simulation that a collisionless fast magnetosonic shock wave can promptly accelerate protons and electrons to relativistic energies; proton energies≳10^9eV and electron energies≳10^6eV. The strong nonstochastic acceleration occurs in a rather strong magnetic field such that ω_<ce>≳ω_<pe>, where ω_<ce> is the electron cyclotron frequency, and ω_<pe> is the electron plasma frequency. The time needed for the proton acceleration is of the order of the ion cyclotron period and is quite short (much less than 1 s for solar plasmas). The electron acceleration time is shorter than the ion cyclotron period. The present shock acceleration mechanism can explain important features of observed particle acceleration in the impulsive phase of solar flares; simultaneous and prompt acceleration of protons and electrons to relativistic energies.
- 核融合科学研究所の論文
著者
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Ohsawa Yukiharu
Research Information Center Institute Of Plasma Physics Nagoya University
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SAKAI Jun-ichi
Research Information Center, Institute of Plasma Physics, Nagoya University
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Sakai Jun-ichi
Research Information Center Institute Of Plasma Physics Nagoya University:department Of Applied Math
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Sakai Jun-ichi
Research Information Center Institute Of Plasma Physics Nagoya University
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