相对论重联中加速电子和正电子的分离
Separation of accelerated electrons and positrons in the relativistic reconnection
摘要：
我们使用2.5维粒子-单元电磁相对论程序研究了相对论磁场重联中电子和正电子的加速。我们考虑具有两个电流片和周期边界条件的模型。电子和正电子在重联的撕裂和合并过程中被非常有效地加速。我们发现，在重联的X点附近，电子和正电子的位置不同。这种分离过程与以前的论文中研究的分析或测试粒子模拟一致。我们预计，在依赖于磁场连接，这种局部分离可以导致全球空间分离的加速电子和正电子。在质子-电子质量比m_i/m_e = 16的电子-质子等离子体中作了类似的模拟。
英文摘要：
We study an acceleration of electrons and positrons in the relativistic magnetic field reconnection using a 2.5-D particle-in-cell electromagnetic relativistic code. We consider the model with two current sheets and periodic boundary conditions. The electrons and positrons are very effectively accelerated during the tearing and coalescence processes of the reconnection. We found that near the X-points of the reconnection the positions of electrons and positrons differ. This separation process is in agreement with those studied in the previous papers analytically or by test particle simulations. We expect that in dependence on the magnetic field connectivity this local separation can lead to global spatial separation of the accelerated electrons and positrons. A similar simulation in the electron-proton plasma with the proton-electron mass ratio m_i/m_e = 16 is made.
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