Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points
Acceleration of Electrons and Protons in Reconnecting Current Sheets Including Single or Multiple X-points
复制标题
包括单个或多个 X 点的重新连接电流片中电子和质子的加速
DOI：
10.1007/s11207-012-9956-1
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发表时间：
2012-03
期刊：
影响因子：
--
通讯作者：
Lin, J
中科院分区：
文献类型：
--
作者：
Li, Y.;Lin, J
研究了导磁场作用下磁重联电流片中电子和质子的运动特性。通过测试粒子计算，计算了不同引导场数值的粒子轨迹。还研究了最终能量与初始位置的关系。我们发现，导向场的加入不仅使粒子获得更多的能量，不仅导致电子和质子的分离，而且还使重新连接的电场选择性地加速不同初始位置的电子和质子。最终得到的能谱是一般的幂函数谱，并且随着导向场的增大，电子能谱指数迅速减小。然而，对于弱背景磁场，质子谱对导向场不是很敏感；而对于强背景场，谱指数的依赖关系与电子谱相似。同时，还研究了包含多个X点和O点的电流片中加速粒子的运动学特性。结果表明，多个X点和O点的存在有助于捕获在加速区的粒子获得更多的能量，并产生双或多个幂定律特征。
Kinematic characteristics of electrons and protons in the magnetic reconnecting current sheet in the presence of a guide field are investigated. Particle trajectories are calculated for different values of the guide field by a test-particle calculation. The relationship between the final energy and the initial position has also been studied. We found that the addition of a guide field not only allows particles to get more energy and not only results in the separation of electrons and protons, but also causes the reconnecting electric field to selectively accelerate electrons and protons for different initial positions. The energy spectrum eventually obtained is the common power-law spectrum, and as the guide field increases, the index for the spectrum of electrons decreases rapidly. However, for a weak background magnetic field, proton spectra are not very sensitive to the guide field; but for a strong background field, the dependence of the spectrum index is similar to the electron spectrum. Meanwhile, kinematic characteristics of the accelerated particles in the current sheet including multiple X-points and O-points were also investigated. The result indicates that the existence of the multiple X- and O-points helps particles trapped in the accelerating region to gain more energy, and yields the double or multiple power-law feature.
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由重连接电场加速的电子能谱：指数定律还是幂律？
影响因子：
4.9
作者：
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DOI：
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期刊：
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期刊：
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