Magnetic reconnection has been observed in the transition region of quasi-parallel shocks. In this work, the particle-in-cell method is used to simulate three-dimensional reconnection in a quasi-parallel shock. The shock transition region is turbulent, leading to the formation of reconnecting current sheets with various orientations. Two reconnection sites with weak and strong guide fields are studied, and it is shown that reconnection is fast and transient. Reconnection sites are characterized using diagnostics including electron flows and magnetic flux transport. In contrast to two-dimensional simulations, weak guide field reconnection is realized. Furthermore, the current sheets in these events form in a direction almost perpendicular to those found in two-dimensional simulations, where the reconnection geometry is constrained.

中文翻译：

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三维激波湍流中的电子尺度重联

在准平行激波的过渡区观察到磁重联。在这项工作中，粒子单元方法用于模拟准平行冲击中的三维重联。冲击过渡区域是湍流的，导致形成具有各种方向的重新连接的电流片。研究了具有弱导场和强导场的两个重联点，表明重联是快速且短暂的。使用包括电子流和磁通量传输在内的诊断来表征重新连接位点。与二维模拟相比，实现了弱导场重联。此外，这些事件中的电流片形成的方向几乎垂直于二维模拟中发现的方向，其中重新连接几何受到限制。