| Effects of Ion-to-Electron Mass Ratio on Electron Dynamics in Collisionless Magnetic Reconnection |
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| 作者姓名： | 郭俊 陆全明 |
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| 作者单位： | [1]School of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao 266041 [2]School of Earth and Space Science, University of Science and Technology of China, Hefei 230026 |
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| 基金项目： | Supported by the Knowledge Innovation Project of Chinese Academy of Sciences under Grant No KZCX3-SW-144, the National Science Foundation of China under Grant Nos 60608015, and the Doctoral Fund of Qingdao University of Science and Technology. |
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| 摘 要： | A 2 1/2-dimensional electromagnetic particle-in-cell （PIC） simulation code is used to investigate electron behaviour in collisionless magnetic reconnectfon. The results show that the ion/electron mass ratio （mi/me） almost has no impact on the reconnection rate, however it can significantly affect electron behaviour in the diffusion region. For the case with larger mass ratio, the width of electron current sheet becomes smaller and the outflow region along the separatrix is smaller, hence the peak of the electron outflow speed is essentially larger. Density cavities and the parallel electric field E// along the separatrix can be found in the case with larger mass ratio, which may have significant influences on the acceleration and heating of the electrons near the X point.
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| 关 键 词： | 离子 电子 相互作用 原子核 |
| 收稿时间： | 2007-05-21 |
Effects of Ion-to-Electron Mass Ratio on Electron Dynamics in Collisionless Magnetic Reconnection |
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| GUO Jun,LU Quan-Ming.Effects of Ion-to-Electron Mass Ratio on Electron Dynamics in Collisionless Magnetic Reconnection[J].Chinese Physics Letters,2007,24(11):3199-3202. |
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| Authors: | GUO Jun LU Quan-Ming |
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| Affiliation: | School of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao 266041School of Earth and Space Science, University of Science and Technology of China, Hefei 230026 |
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| Abstract: | A 2.5-dimensional electromagnetic particle-in-cell (PIC) simulation code is used to investigate electron behaviour in collisionless magnetic reconnection. The results show that the ion/electron mass ratio (mi/me) almost has no impact on the reconnection rate, however it can significantly affect electron behaviour in the diffusion region. For the case with larger mass ratio, the width of electroncurrent sheet becomes smaller and the outflow region along the separatrix is smaller, hence the peak of the electron outflow speed is essentially larger.Density cavities and the parallel electric field E// along the separatrix can be found in the case with larger mass ratio, which may have significant influences on the acceleration and heating of the electrons near the X point. |
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| Keywords: | 52 35 Vd 52 65 Rr |
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