Island instability as a mechanism of destabilization and collapse of current sheets

  title={Island instability as a mechanism of destabilization and collapse of current sheets},
  author={I. F. Shaikhislamov},
  journal={Plasma Physics and Controlled Fusion},
  pages={645 - 655}
  • I. Shaikhislamov
  • Published 1 April 2005
  • Physics
  • Plasma Physics and Controlled Fusion
The work shows that a single elongated island immersed in the quasi-neutral current sheet makes it MHD unstable. Typical values of growth rate are found to be several per cent of inverse Alfven time for broad sheets. Hall dynamics greatly enhance instability and growth rate reaches one-tenth of ion cyclotron frequency when sheet width is comparable to ion inertia length. A weak square-root dependence of increment on island width and length is derived both from numerical simulation and… 
2 Citations
Collapse of the neutral current sheet and reconnection at micro-scales
Abstract Reconnection physics at micro-scales is investigated in an electron magnetohydrodynamics frame. A new process of collapse of the neutral current sheet is demonstrated by means of analytical
Author index with titles
  • Physics
  • 2005
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Hall dynamics and resistive tearing instability
The stability of the neutral current sheet is analyzed in the frame of Hall dynamics. The problem is treated analytically and results are verified by numerical processing. A new version of tearing
Hall current effect on tearing mode instability
From a linear 2-D eigenmode analysis, we found that the Hall current effect on collisional tearing mode instability becomes important for the thin magnetic reversal layer whose width is comparable to
Coalescence instability of magnetic islands
The stability of a periodic magnetic island structure using the ideal magnetohydrodynamic equations has been investigated. An instability is found which describes the tendency toward coalescence of
Fast impulsive reconnection and current sheet intensification due to electron pressure gradients in semi‐collisional plasmas
A numerical simulation of forced reconnection and current sheet growth due to inward boundary flows in semi-collisional plasmas is presented, and contrasted with the results of an incompressible
Experimental study of lower-hybrid drift turbulence in a reconnecting current sheet
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The magnetohydrodynamics of current sheets
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Open and closed magnetospheric tail configurations and their stability
The asymptotic theory valid for magnetospheric tail configurations that vary only weakly in the antisolar direction is used to derive a number of explicit properties. The conditions under which the
Magnetic reconnection driven by the coalescence instability
A detailed study of magnetic reconnection at an X point driven by the coalescence instability is presented. In particular, the effects of plasma compressibility and the magnitude of the toroidal
Electron magnetohydrodynamic simulations of magnetic island coalescence
The role of electrons in driving magnetic island coalescence in the electron magnetohydrodynamic limit is investigated. In particular, the dependence of the coalescence time tc(f) (defined as the
Transition to whistler mediated magnetic reconnection
The transition in the magnetic reconnection rate from the resistive magnetohydrodynamic (MHD) regime where the Alfven wave controls reconnection to a regime in which the ions become unmagnetized and