Journal ArticleDOI
Physical Origin of the Quadrupole Out-of-Plane Magnetic Field in Hall-MHD Reconnection
TLDR
In this paper, the physical origin of the quadrupole field is analyzed and traced to a current of electrons that flows along the lines in and out of the inner reconnection region to maintain charge neutrality.Abstract:
A quadrupole pattern of the out-of-plane component of the magnetic field inside a reconnection region is seen as an important signature of the Hall-magnetohydrodynamic (Hall-MHD) regime of reconnection. It has been first observed in numerical simulations and just recently confirmed in the MRX (Magnetic Reconnection Experiment) [M. Yamada, H. Ji, S. Hsu, T. Carter, R. Kulsrud, N. Bertz, F. Jobes, Y. Ono, and F. Perkins, Phys. Plasmas 4, 1936 (1997)] and also seen in spacecraft observations of Earth's magnetosphere. In this study, the physical origin of the quadrupole field is analyzed and traced to a current of electrons that flows along the lines in and out of the inner reconnection region to maintain charge neutrality. The role of the quadrupole magnetic field in the overall dynamics of the reconnection process is discussed. In addition, the bipolar poloidal electric field is estimated and its effect on ion motions is emphasized.read more
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Journal ArticleDOI
Magnetospheric Multiscale Overview and Science Objectives
TL;DR: Magnetospheric multiscale (MMS) as mentioned in this paper is a NASA four-spacecraft constellation mission to investigate magnetic reconnection in the boundary regions of the Earth's magnetosphere.
Journal ArticleDOI
Magnetic Reconnection in Astrophysical and Laboratory Plasmas
Ellen G. Zweibel,Masaaki Yamada +1 more
TL;DR: Magnetic reconnection is a topological rearrangement of magnetic field that converts magnetic energy to plasma energy as discussed by the authors, which is essential for dynamos and the large-scale restructuring known as magnetic self-organization.
Journal ArticleDOI
Experimental study of two-fluid effects on magnetic reconnection in a laboratory plasma with variable collisionality
Masaaki Yamada,Yang Ren,Hantao Ji,Joshua Breslau,Stefan Gerhardt,Russell M. Kulsrud,Aleksey Kuritsyn +6 more
TL;DR: Yamada et al. as mentioned in this paper described the recent findings on two-fluid effects on magnetic reconnection in plasmas with variable collisionality in the Magnetic reconnection experiment (MRX) and observed that the two-dimensional profile of the neutral sheet is changed significantly from the rectangular shape of the familiar Sweet-Parker type to a double wedge shape as the collisionality is reduced and the reconnection rate increases.
Journal ArticleDOI
Non-thermal particle acceleration in collisionless relativistic electron-proton reconnection
Gregory R. Werner,Dmitri A. Uzdensky,Dmitri A. Uzdensky,Mitchell C. Begelman,Mitchell C. Begelman,Benoît Cerutti,Krzysztof Nalewajko +6 more
TL;DR: In this article, a comprehensive particle-in-cell numerical investigation of reconnection in an electron-ion plasma, spanning a wide range of ambient ion magnetizations, was performed, showing that the reconnection rate is about 0.1 of the Alfvenic rate across all regimes.
Journal ArticleDOI
3D turbulent reconnection: Theory, tests, and astrophysical implications
TL;DR: In this paper, it was shown that the tearing reconnection is suppressed in 3D, and unlike the 2D settings, 3D reconnection induces turbulence that makes magnetic reconnection independent of resistivity.