Study of three dimensional reconnection processes

我们研究了磁中性线的三维结构，认为它在空间等离子体环境中的磁重联过程中是重要的。新发现/新进展是：1)新的高精度混合/双流体数值格式。由于撕裂模和漂移波不稳定性的耦合，发现了湍流的激发2)速度扰动和场扰动之间阿尔文关系的观测证据，这是我们在1993.3的研究中从理论上预测的)建立了一个新的保留电子惯性效应的2-流体/混合方案，这被认为对磁中性线的微观结构是重要的。发现了电子尾流贡献超过离子尾流的可能性。4)非Harris型尾流结构的观测5)磁尾湍流中存在一个特征的时空尺度

We have studied the tree dimensional structure of the magnetic neutral line, which is believed to be important in the magnetic reconnection process in space plasma environment. New findings/developments are1) New hybrid/two-fluid numerical scheme with high accuracy. Discovery of the excitation of turbulence due to the coupling between tearing mode and drift wave instabilities2) Observational evidence of the Alfvenic relation between the velocity perturbation and field perturbation, which has been theoretically predicated in our study in 1993.3) Construction of a new 2-fluid/hybrid scheme retaining the electron inertia effect, which is believed to be important for the microstructure of magnetic neutral lines. We have found the possibility that the electron tail current contribution can exceed the ion tail current.4) Observation of non-Harris type tail current structure5) Existence of a characteristic spatial/time scale in the magnetotail turbulence