| 不可压缩等离子体的2维磁场重联模型 |
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| 引用本文： | 但加坤,段书超,章征伟.不可压缩等离子体的2维磁场重联模型[J].强激光与粒子束,2012,24(8):1901-1906. |
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| 作者姓名： | 但加坤 段书超 章征伟 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所,四川 绵阳 621 900 |
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| 基金项目： | Supported by the Development Foundation of Institute of Fluid Physics (SFZ20110402) |
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| 摘 要： | 提出了一种2维磁场重联模型。磁场重联过程中的电荷分离在等离子体中产生静电场，等离子体在电场中的漂移运动可以解释阿尔芬速度量级的出流。该磁场重联模型给出如下结论:Sweet-Parker模型描述的重联率强烈地依赖于电子质量与离子质量之比；反常电阻率正比于离子惯性长度和电流片宽度比值的平方; 相对论效应和高温等离子体中电子-正电子对的产生可以提高重联率; 电磁波的激发对于磁能的损耗是必要的。
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| 关 键 词： | 磁场重联 不可压缩等离子体 电荷分离 静电场 |
| 收稿时间： | 2011/11/21 |
Two-dimensional magnetic reconnection model for incompressible plasmas |
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| Dan Jiakun
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Duan Shuchao
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Zhang Zhengwei.Two-dimensional magnetic reconnection model for incompressible plasmas[J].High Power Laser and Particle Beams,2012,24(8):1901-1906. |
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| Authors: | Dan Jiakun Duan Shuchao Zhang Zhengwei |
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| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China |
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| Abstract: | A modified two-dimensional magnetic reconnection model is presented which focuses on the role of electrostatic field generated by charge separation in magnetic reconnection, and the E cross B drift causing the Alfvénic outflows. This reconnection model reveals that the reconnection rate described in Sweet-Parker model is strongly dependent on the ratio of the electron mass and the ion mass, and the effective local resistivity normalized by the Spitzer resistivity is proportional to the square of the ratio of the ion skin depth to the width of the current sheet. The relativistic effect and creation of electron-positron pairs in high temperature plasmas can enhance the reconnection rate. The excitation of electromagnetic waves is necessary for dissipation of magnetic energy. |
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| Keywords: | magnetic reconnection incompressible plasmas charge separation electrostatic field |
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