منابع مشابه
0 Se p 20 09 Turbulence , Complexity , and Solar Flares
The issue of predicting solar flares is one of the most fundamental in physics, addressing issues of plasma physics, high-energy physics, and modelling of complex systems. It also poses societal consequences, with our ever-increasing need for accurate space weather forecasts. Solar flares arise naturally as a competition between an input (flux emergence and rearrangement) in the photosphere and...
متن کاملDamping of MHD turbulence in Solar Flares
We describe the cascade of plasma waves or turbulence injected, presumably by reconnection, at scales comparable to the size of a solar flare loop, L ∼ 109 cm, to scales comparable to elementary particle gyro radii, and evaluate their damping at small scales by various mechanisms. We show that the classical viscous damping valid on scales larger than the collision mean free path (∼ 108 cm) is u...
متن کاملPlasma Turbulence and Stochastic Acceleration in Solar Flares
Observational aspects of solar flares relevant to the acceleration process of electrons and protons are reviewed and it is shown that most of these observations can be explained by the interaction with flare plasma of a power law energy distribution of electrons (and protons) that are injected at the top of a flaring loop, in the so-called thick target model. Some new observations that do not a...
متن کاملMassively Parallel Simulations of Solar Flares and Plasma Turbulence
c © 2007 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior specific permission by the publisher ment...
متن کاملStochastic particle acceleration by helical turbulence in solar flares
Flaring release of magnetic energy in solar corona is only possible if the magnetic field deviates from a potential one. We show that the linear magnetohydrodynamic (MHD) modes excited on top of the non-potential magnetic field possess a non-zero kinetic helicity. Accordingly, this necessarily results in a noticeable kinetic helicity of the turbulence, composed of these linear modes with variou...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 2010
ISSN: 0273-1177
DOI: 10.1016/j.asr.2009.08.026