Magnetohydrodynamic study of three-dimensional instability of the spontaneous fast magnetic reconnection

Shimizu, T.; Kondoh, K.; Shibata, K.; Ugai, M.
May 2009
Physics of Plasmas;May2009, Vol. 16 Issue 5, p052903
Academic Journal
Three-dimensional instability of the spontaneous fast magnetic reconnection is studied with magnetohydrodynamic (MHD) simulation, where the two-dimensional model of the spontaneous fast magnetic reconnection is destabilized in three dimension. Generally, in two-dimensional magnetic reconnection models, every plasma condition is assumed to be uniform in the sheet current direction. In such two-dimensional MHD simulations, the current sheet destabilized by the initial resistive disturbance can be developed to fast magnetic reconnection by a current driven anomalous resistivity. In this paper, the initial resistive disturbance includes a small amount of fluctuations in the sheet current direction, i.e., along the magnetic neutral line. The other conditions are the same as that of previous two-dimensional MHD studies for fast magnetic reconnection. Accordingly, we may expect that approximately two-dimensional fast magnetic reconnection occurs in the MHD simulation. In fact, the fast magnetic reconnection activated on the first stage of the simulation is two dimensional. However, on the subsequent stages, it spontaneously becomes three dimensional and is strongly localized in the sheet current direction. The resulting three-dimensional fast magnetic reconnection intermittently ejects three-dimensional magnetic loops. Such intermittent ejections of the three-dimensional loops are similar to the intermittent downflows observed in the solar flares. The ejection of the three-dimensional loops seems to be random but, numerically and theoretically, it is shown that the aspect ratio of the ejected loops is limited under a criterion.


Related Articles

  • Torsional magnetic reconnection at three dimensional null points: A phenomenological study. Wyper, Peter; Jain, Rekha // Physics of Plasmas;Sep2010, Vol. 17 Issue 9, p092902 

    Magnetic reconnection around three dimensional (3D) magnetic null points is the natural progression from X-point reconnection in two dimensions. In 3D the separator field lines of the X-point are replaced with the spine line and fan plane (the field lines which asymptotically approach or recede...

  • Fast reconnection in high temperature plasmas. Kleva, Robert G.; Drake, J. F. // Physics of Plasmas;Jan1995, Vol. 2 Issue 1, p23 

    Demonstrates how pressure forces acting on electrons dramatically alter magnetic field line reconnection in high temperature plasmas. Physical scale length; Ion gyroradius based on the electron temperature; Resistive magnetohydrodynamic equations; Single dissipation layer of resistive MHD.

  • Spectral scaling in the turbulent Earth's plasma sheet revisited. Vörös, Z.; Baumjohann, W.; Nakamura, R.; Runov, A.; Volwerk, M.; Asano, Y.; Jankovičová, D.; Lucek, E. A.; Rème, H. // Nonlinear Processes in Geophysics;2007, Vol. 14 Issue 4, p535 

    Bursty bulk flow associated magnetic fluctuations exhibit at least three spectral scaling ranges in the Earth's plasma sheet. Two of the three scaling ranges can be associated with multi-scale magnetohydrodynamic turbulence between the spatial scales from ~100 km to several RE (RE is the Earth's...

  • Experimental evidence of fast reconnection via trapped electron motion. Egedal, J.; Fox, W.; Porkolab, M.; Fasoli, A. // Physics of Plasmas;May2004, Vol. 11 Issue 5, p2844 

    Magnetic reconnection in collisionless magnetohydrodynamic plasmas is studied under controlled conditions in toroidal X-line configurations formed in the center of the Versatile Toroidal Facility [J. Egedal et al., Rev. Sci. Instrum. 71, 3351 (2000)]. Profiles of key parameters are measured...

  • Interplay between Magnetic Reconnection and the Kelvin-Helmholtz and Rayleigh-Taylor Instabilities in a Magnetized Inhomogeneous Plasma with a Velocity Shear. Faganello, M.; Califano, F.; Pegoraro, F. // AIP Conference Proceedings;10/15/2008, Vol. 1061 Issue 1, p217 

    The competition between instabilities in a plasma can lead to qualitatively different configurations that can be observed experimentally. The outcome of this competition gives us important clues about the time development of these instabilities as we can use one to clock the development of the...

  • Magnetic reconnection with Sweet-Parker characteristics in two-dimensional laboratory plasmas. Hantao Ji; Yamada, Masaaki; Hsu, Scott; Kulsrud, Russell; Carter, Troy; Zaharia, Sorin // Physics of Plasmas;May99, Vol. 6 Issue 5, p1743 

    Magnetic reconnection has been studied experimentally in a well-controlled, two-dimensional laboratory magnetohydrodynamic plasma. The observations are found to be both qualitatively and quantitatively consistent with a generalized Sweet-Parker model which incorporates compressibility,...

  • Particle-in-cell simulation with Vlasov ions and drift kinetic electrons. Chen, Yang; Parker, Scott E. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p052305 

    There are certain limitations in using gyrokinetic ions for simulations of turbulent transport in tokamak plasmas. Applications where Vlasov ions might be more appropriate include the electron temperature gradient driven turbulence, edge turbulence with steep density gradient, and magnetic...

  • Influences of sub-Alfvénic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas. Zhang, X.; Li, L. J.; Wang, L. C.; Li, J. H.; Ma, Z. W. // Physics of Plasmas;Sep2011, Vol. 18 Issue 9, p092112 

    Influences of sub-Alfvénic shear flows on the nonlinear evolution of the magnetic reconnection are studied in the framework of compressible resistive MHD and compressible Hall MHD. It is found for the first time that the sub-Alfvénic shear flow can either stabilize or destabilize magnetic...

  • Magnetic reconnection in electron magnetohydrodynamics. Bulanov, S. V.; Pegoraro, F.; Sakharov, A. S. // Physics of Fluids B: Plasma Physics;Aug92, Vol. 4 Issue 8, p2499 

    The magnetic field dynamics and reconnection processes in a highly conducting plasma are investigated in the regimes where Ohm’s law is dominated by the Hall term, using a single (electron) fluid description (electron magnetohydrodynamics). In these regimes, which correspond to the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics