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3D Reconnection Due to Oblique Modes: a Simulation of Harris Current Sheets : Volume 7, Issue 3/4 (30/11/-0001)

By Lapenta, G.

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Book Id: WPLBN0004019951
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: 3D Reconnection Due to Oblique Modes: a Simulation of Harris Current Sheets : Volume 7, Issue 3/4 (30/11/-0001)  
Author: Lapenta, G.
Volume: Vol. 7, Issue 3/4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Brackbill, J. U., & Lapenta, G. (-0001). 3D Reconnection Due to Oblique Modes: a Simulation of Harris Current Sheets : Volume 7, Issue 3/4 (30/11/-0001). Retrieved from http://hawaiilibrary.net/


Description
Description: Istituto Nazionale per la Fisica della Materia and Dipartimento di Energetica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy. Simulations in three dimensions of a Harris current sheet with mass ratio, mi/me = 180, and current sheet thickness, pi/L = 0.5, suggest the existence of a linearly unstable oblique mode, which is independent from either the drift-kink or the tearing instability. The new oblique mode causes reconnection independently from the tearing mode. During the initial linear stage, the system is unstable to the tearing mode and the drift kink mode, with growth rates that are accurately described by existing linear theories. How-ever, oblique modes are also linearly unstable, but with smaller growth rates than either the tearing or the drift-kink mode. The non-linear stage is first reached by the drift-kink mode, which alters the initial equilibrium and leads to a change in the growth rates of the tearing and oblique modes. In the non-linear stage, the resulting changes in magnetic topology are incompatible with a pure tearing mode. The oblique mode is shown to introduce a helical structure into the magnetic field lines.

Summary
3D reconnection due to oblique modes: a simulation of Harris current sheets

 

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