Stochastic Particle Acceleration in Multiple Magnetic Islands during Reconnection
Jan, 2012Citations per year
Abstract: (arXiv)
A nonthermal particle acceleration mechanism involving the interaction of a charged particle with multiple magnetic islands is proposed. The original Fermi acceleration model, which assumes randomly distributed magnetic clouds moving at random velocity in the interstellar medium, is known to be of second-order acceleration of owing to the combination of head-on and head-tail collisions. In this letter, we reconsider the original Fermi model by introducing multiple magnetic islands during reconnect ion instead of magnetic clouds. We discuss that the energetic particles have a tendency to be distributed outside the magnetic islands, and they mainly interact with reconnection outflow jets. As a result, the acceleration efficiency becomes first-order of , where and are the Alfv\'en velocity and the speed of light, respectively.- 52.35.Vd
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References(17)
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