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| Titel |
High reconnection rate and associated strong electron acceleration in the vortex-induced-reconnection process |
| VerfasserIn |
Takuma Nakamura, Iku Shinohara, Masaki Fujimoto |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250034825
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| Zusammenfassung |
| Magneto-hydrodynamic (MHD) turbulence has often been observed in various regions of space. The MHD turbulence has been an important candidate for the source of non-thermal, high-energy particles. In order to directly understand the particle acceleration process in MHD turbulence, kinetic simulations are necessary to be performed. However, it is impossible to directly solve a large-scale MHD-turbulence by kinetic simulations. In this study, we focused on the fact that the developed turbulence tends to consists of various-scale vortices, and performed full particle simulations on one vortex to understand how particles are accelerated in a vortex. As a result, we found that magnetic reconnection driven by the vortex flow (so-called the vortex-induced-reconnection) can cause the anomalously strong electron acceleration. This is because the reconnection rate of the dynamic vortex-induced-reconnection process is anomalously higher than that of the static reconnection process. In this presentation, we will show the detailed acceleration mechanism of electrons in the vortex-induced-reconnection process, and the results of the parameter survey for the size of the vortex and the magnitude of the vortex flow speed. |
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