The present study is focused on the problem of reconstruction of the magnetic configuration in the magnetic reconnection electron diffusion region (EDR). The problem is addressed in the frame of electron magnetohydrodynamics with kept electron inertia term. We introduce the new reconstruction model independent of divergence of the electron pressure tensor and reconnection electric field. The model is tested on the magnetotail reconnection event of July 11, 2017 observed by the Magnetospheric Multiscale (MMS) spacecraft in the course of crossing the very core part of the reconnection region, the internal EDR. This new model demonstrates considerably better accuracy of the longitudinal electron velocity reconstruction due to the lower sensitivity to the configuration deviation from the two‐dimensional time‐independent model adopted in our study. We suggest also a new technique to estimate the guide field, implementing the reconstruction of magnetic potential of the in‐plane magnetic field and relying on symmetric properties of magnetic reconnection.

中文翻译：

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基于惯性的电子扩散区重构模型

本研究的重点是在磁重连接电子扩散区（EDR）中重建磁构型的问题。在具有保持电子惯性项的电子磁流体动力学的框架中解决了该问题。我们介绍了新的重建模型，该模型与电子压力张量和重新连接电场的发散无关。该模型在2017年7月11日磁尾重连事件上进行了测试，该事件由磁层多尺度（MMS）航天器在穿越重连区域的核心部分即内部EDR的过程中观察到。由于与我们研究中采用的二维时间独立模型相比，对构型偏差的敏感性较低，因此该新模型显示出纵向电子速度重构的准确度更高。