Revealing the sub-structures of the magnetic reconnection separatrix via particle-in-cell simulation
| Autor: | S. Y. Huang, D. D. Wang, Xiaojun Xu, Meng Zhou, Y. Pang, H. M. Li, M. Yao, Zhigang Yuan, Y. H. Wang, Xiaohua Deng |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 19:072907 |
| ISSN: | 1089-7674 1070-664X |
| Popis: | Magnetic separatrix is an important boundary layer separating the inflow and outflow regions in magnetic reconnection. In this article, we investigate the sub-structures of the separatrix region by using two-and-half dimensional electromagnetic particle-in-cell simulation. The separatrix region can be divided into two sub-regions in terms of the ion and electron frozen-in conditions. Far from the neutral sheet, ions and electrons are magnetized in magnetic fields. Approaching the neutral sheet, ion frozen-in condition is broken in a narrow region (∼c/ωpi) at the edge of a density cavity, while electrons are frozen-in to magnetic fields. In this region, electric field Ez is around zero, and the convective term –(vi × B) is balanced by the Hall term in the generalized Ohm’s law because ions carry the perpendicular current. Inside the density cavity, both ion and electron frozen-in conditions are broken. The region consists of two sub-ion or electron-scale layers, which contain intense electric fields. Forma... |
| Databáze: | OpenAIRE |
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