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Titolo:
The origins of electrical resistivity in magnetic reconnection: Studies by2D and 3D macro particle simulations
Autore:
Tanaka, M;
Indirizzi:
Natl Inst Fus Sci, Res & Informat Ctr, Toki 5095292, Japan Natl Inst Fus Sci Toki Japan 5095292 & Informat Ctr, Toki 5095292, Japan
Titolo Testata:
EARTH PLANETS AND SPACE
fascicolo: 6, volume: 53, anno: 2001,
pagine: 463 - 472
SICI:
1343-8832(2001)53:6<463:TOOERI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-FREQUENCY; COLLISIONLESS; IMPLICIT; PLASMAS; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Tanaka, M Natl Inst Fus Sci, Res & Informat Ctr, Toki 5095292, Japan Natl Inst Fus Sci Toki Japan 5095292 Ctr, Toki 5095292, Japan
Citazione:
M. Tanaka, "The origins of electrical resistivity in magnetic reconnection: Studies by2D and 3D macro particle simulations", EARTH PL SP, 53(6), 2001, pp. 463-472

Abstract

This article argues the roles of electrical resistivity in magnetic reconnection, and also presents recent 3D particle simulations of coalescing magnetized flux bundles. Anomalous resistivity of the lower-hybrid-drift (LHD) instability, and collisionless effects of electron inertia and/or off-diagonal terms of electron pressure tensor are thought to break the frozen-in state that prohibits magnetic reconnection. Studies show that, while well-known stabilization of the LHD instability in high-beta plasma condition makesanomalous resistivity less likely, the electron inertia and/or the off-diagonal electron pressure tensor terms make adequate contributions to break the frozen-in state, depending on strength of the toroidal magnetic field. Large time and space scale particle simulations show that reconnection in magnetized plasmas proceeds by means of electron inertia effect, and that electron acceleration results instead of Joule heating of the MHD picture. Ioninertia contributes positively to reconnection, but ion finite Larmor radius effect does negatively because of charge separation of ions and magnetized electrons. The collisionless processes of the 2D and 3D simulations are similar in essence, and support the mediative role of electron inertia in magnetic reconnection of magnetized plasmas.

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Documento generato il 01/04/20 alle ore 11:37:37