相对论对等离子体重联中重联喷流前沿的韦伯不稳定性的作用
The role of the Weibel instability at the reconnection jet front in relativistic pair plasma reconnection
摘要：
在大尺度磁重联问题的背景下，第一次研究的韦伯不稳定性的作用。用粒子模拟方法研究了相对论对等离子体中磁重联的晚期演化。在外流区，强重联喷流堆积磁场，出现切向不连续。进一步下游，它被发现，相对论性的韦伯不稳定性的二维扩展产生电-磁场，这是可比较的反平行或堆积场。从微观的角度来看，不稳定性允许等离子体与不连续性的多次相互作用。从宏观上看，不稳定性导致电流片迅速膨胀，重联射流锋进一步向下游传播。可能的应用程序的三维情况下进行了简要讨论。
英文摘要：
The role of the Weibel instability is investigated for the first time in the context of the large-scale magnetic reconnection problem. A late-time evolution of magnetic reconnection in relativistic pair plasmas is demonstrated by particle-in-cell (PIC) simulations. In the outflow regions, powerful reconnection jet piles up the magnetic fields and then a tangential discontinuity appears there. Further downstream, it is found that the two-dimensional extension of the relativistic Weibel instability generates electro-magnetic fields, which are comparable to the anti-parallel or piled-up fields. In a microscopic viewpoint, the instability allows plasma's multiple interactions with the discontinuity. In a macroscopic viewpoint, the instability leads to rapid expansion of the current sheet and then the reconnection jet front further propagates into the downstream. Possible application to the three-dimensional case is briefly discussed.
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