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Title: Nonlinear regimes of forced magnetic reconnection

This letter presents a self-consistent description of nonlinear forced magnetic reconnection in Taylor's model of this process. If external boundary perturbation is strong enough, nonlinearity in the current sheet evolution becomes important before resistive effects come into play. This terminates the current sheet shrinking that takes place at the linear stage and brings about its nonlinear equilibrium with a finite thickness. Then, in theory, this equilibrium is destroyed by a finite plasma resistivity during the skin-time, and further reconnection proceeds in the Rutherford regime. However, realization of such a scenario is unlikely because of the plasmoid instability, which is fast enough to develop before the transition to the Rutherford phase occurs. The suggested analytical theory is entirely different from all previous studies and provides proper interpretation of the presently available numerical simulations of nonlinear forced magnetic reconnection.
Authors:
 [1] ;  [2] ;  [3]
  1. JBCA, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)
  2. (Japan)
  3. STEL, Nagoya University, Nagoya, Aichi 464-8601 (Japan)
Publication Date:
OSTI Identifier:
22490120
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; CURRENTS; DISTURBANCES; EQUILIBRIUM; MAGNETIC RECONNECTION; NONLINEAR PROBLEMS; PLASMA; PLASMA INSTABILITY