Wave Diffusion and Stochastic Particle Acceleration in 3He-Rich Events

Details Wave Diffusion and Stochastic Particle Acceleration in 3He-Rich Events Wave Diffusion and Stochastic Particle Acceleration in 3He-Rich Events

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh53b..03l&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH53B-03

Physics

7845 Particle Acceleration, 7846 Plasma Energization, 7857 Stochastic Phenomena (3235, 3265, 4475), 7863 Turbulence (4490), 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

Resonant wave-particle interaction plays essential roles in the enrichment of high-energy elements of solar 3He-rich events, which are triggered by the energy release processes of magnetic field reconnection in the solar corona. In the context of stochastic particle acceleration by plasma waves, the released magnetic field energy drives the generation of large scale waves, which then cascade to small scales and accelerate some of the charged background particles to high energies in this process. The wave cascading from large scales to small scales can be described as a diffusion process in the wavenumber space along different wave-mode branches. In this talk, we show how the enrichment of 3He and heavy elements may be addressed self-consistently with the stochastic particle acceleration model and the diffusion approximation for the wave cascade. The model predicted results only depend on the properties of the background plasma and the energy release rate. Observations of 3He-rich events can be used to constrain the diffusion tensors of different wave-mode branches, which will lead to a better understanding the energy release processes of magnetic reconnection.

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