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Title: Catastrophic onset of fast magnetic reconnection with a guide field

Abstract

It was recently shown that the slow (collisional) Sweet-Parker and the fast (collisionless) Hall magnetic reconnection solutions simultaneously exist for a wide range of resistivities; reconnection is bistable [Cassak, Shay, and Drake, Phys. Rev. Lett., 95, 235002 (2005)]. When the thickness of the dissipation region becomes smaller than a critical value, the Sweet-Parker solution disappears and fast reconnection ensues, potentially explaining how large amounts of magnetic free energy can accrue without significant release before the onset of fast reconnection. Two-fluid numerical simulations extending the previous results for anti-parallel reconnection (where the critical thickness is the ion skin depth) to component reconnection with a large guide field (where the critical thickness is the thermal ion Larmor radius) are presented. Applications to laboratory experiments of magnetic reconnection and the sawtooth crash are discussed.

Authors:
; ;  [1];  [2]
  1. University of Maryland, College Park, Maryland 20742 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20975018
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 5; Other Information: DOI: 10.1063/1.2734948; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DEPTH; FREE ENERGY; IONS; LARMOR RADIUS; MAGNETIC RECONNECTION; MAGNETOHYDRODYNAMICS; MATHEMATICAL SOLUTIONS; PLASMA; PLASMA INSTABILITY; PLASMA SIMULATION; SAWTOOTH OSCILLATIONS

Citation Formats

Cassak, P. A., Drake, J. F., Shay, M. A., and University of Delaware, Newark, Delaware 19716. Catastrophic onset of fast magnetic reconnection with a guide field. United States: N. p., 2007. Web. doi:10.1063/1.2734948.
Cassak, P. A., Drake, J. F., Shay, M. A., & University of Delaware, Newark, Delaware 19716. Catastrophic onset of fast magnetic reconnection with a guide field. United States. doi:10.1063/1.2734948.
Cassak, P. A., Drake, J. F., Shay, M. A., and University of Delaware, Newark, Delaware 19716. Tue . "Catastrophic onset of fast magnetic reconnection with a guide field". United States. doi:10.1063/1.2734948.
@article{osti_20975018,
title = {Catastrophic onset of fast magnetic reconnection with a guide field},
author = {Cassak, P. A. and Drake, J. F. and Shay, M. A. and University of Delaware, Newark, Delaware 19716},
abstractNote = {It was recently shown that the slow (collisional) Sweet-Parker and the fast (collisionless) Hall magnetic reconnection solutions simultaneously exist for a wide range of resistivities; reconnection is bistable [Cassak, Shay, and Drake, Phys. Rev. Lett., 95, 235002 (2005)]. When the thickness of the dissipation region becomes smaller than a critical value, the Sweet-Parker solution disappears and fast reconnection ensues, potentially explaining how large amounts of magnetic free energy can accrue without significant release before the onset of fast reconnection. Two-fluid numerical simulations extending the previous results for anti-parallel reconnection (where the critical thickness is the ion skin depth) to component reconnection with a large guide field (where the critical thickness is the thermal ion Larmor radius) are presented. Applications to laboratory experiments of magnetic reconnection and the sawtooth crash are discussed.},
doi = {10.1063/1.2734948},
journal = {Physics of Plasmas},
number = 5,
volume = 14,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}