X-point collapse and saturation in the nonlinear tearing mode reconnection

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dc.creatorLoureiro, N. F.
dc.creatorCowley, S. C.
dc.creatorDorland, W. D.
dc.creatorHaines, M. G.
dc.creatorSchekochihin, A. A.
dc.date2005-07-28
dc.date.accessioned2026-07-07T10:47:01Z
dc.date.available2026-07-07T10:47:01Z
dc.descriptionWe study the nonlinear evolution of the resistive tearing mode in slab geometry in two dimensions. We show that, in the strongly driven regime (large Delta'), a collapse of the X-point occurs once the island width exceeds a certain critical value ~1/Delta'. A current sheet is formed and the reconnection is exponential in time with a growth rate ~eta^1/2, where eta is the resistivity. If the aspect ratio of the current sheet is sufficiently large, the sheet can itself become tearing-mode unstable, giving rise to secondary islands, which then coalesce with the original island. The saturated state depends on the value of Delta'. For small Delta', the saturation amplitude is ~Delta' and quantitatively agrees with the theoretical prediction. If Delta' is large enough for the X-point collapse to have occured, the saturation amplitude increases noticeably and becomes independent of Delta'.
dc.descriptionrevtex4, 4 pages, 18 figures
dc.identifierhttps://arxiv.org/abs/physics/0507206
dc.identifierhttp://arxiv.org/abs/physics/0507206
dc.identifierPhys.Rev.Lett.95:235003,2005
dc.identifierdoi:10.1103/PhysRevLett.95.235003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183432
dc.subjectPlasma Physics
dc.subjectAstrophysics
dc.subjectSpace Physics
dc.titleX-point collapse and saturation in the nonlinear tearing mode reconnection
dc.typetext

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