Jet Deflection by Very Weak Guide Fields during Magnetic Reconnection

被引：52

作者：

Goldman, M. V. ^{[1
,2
]}

Lapenta, G. ^{[3
]}

Newman, D. L. ^{[1
,2
]}

Markidis, S. ^{[3
]}

Che, H. ^{[1
,2
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Colorado, CIPS, Boulder, CO 80309 USA

[3] Katholieke Univ Leuven, Ctr Plasma Astrofys, Louvain, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.107.135001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Previous 2D simulations of reconnection using a standard model of initially antiparallel magnetic fields have detected electron jets outflowing from the x point into the ion outflow exhausts. Associated with these jets are extended "outer electron diffusion regions.'' New PIC simulations with an ion to electron mass ratio as large as 1836 (an H+ plasma) now show that the jets are strongly deflected and the outer electron diffusion region is broken up by a very weak out-of-plane magnetic guide field, even though the diffusion rate itself is unchanged. Jet outflow and deflection are interpreted in terms of electron dynamics and are compared to recent measurements of jets in the presence of a small guide field in Earth's magnetosheath.

引用

页数：4

共 17 条

[1] Structure of the electromagnetic field in three-dimensional Hall magnetohydrodynamic turbulence [J].

Dmitruk, P ;

Matthaeus, WH .

PHYSICS OF PLASMAS, 2006, 13 (04)

[2] Time evolution of the electron diffusion region and the reconnection rate in fully kinetic and large system [J].

Fujimoto, Keizo .

PHYSICS OF PLASMAS, 2006, 13 (07)

[3] The diffusion region in collisionless magnetic reconnection [J].

Hesse, M ;

Schindler, K ;

Birn, J ;

Kuznetsova, M .

PHYSICS OF PLASMAS, 1999, 6 (05) :1781-1795

[4]

KARIMABADI, 2005, J GEOPHYS RES, V110

[5] Multi-scale structure of the electron diffusion region [J].

Karimabadi, H. ;

Daughton, W. ;

Scudder, J. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (13)

[6] Scales of guide field reconnection at the hydrogen mass ratio [J].

Lapenta, G. ;

Markidis, S. ;

Divin, A. ;

Goldman, M. ;

Newman, D. .

PHYSICS OF PLASMAS, 2010, 17 (08)

[7] Equations of state in collisionless magnetic reconnection [J].

Le, A. ;

Egedal, J. ;

Fox, W. ;

Katz, N. ;

Vrublevskis, A. ;

Daughton, W. ;

Drake, J. F. .

PHYSICS OF PLASMAS, 2010, 17 (05)

[8] Magnitude of the Hall fields during magnetic reconnection [J].

Le, A. ;

Egedal, J. ;

Daughton, W. ;

Drake, J. F. ;

Fox, W. ;

Katz, N. .

GEOPHYSICAL RESEARCH LETTERS, 2010, 37

[9] Multi-scale simulations of plasma with iPIC3D [J].

Markidis, Stefano ;

Lapenta, Giovanni ;

Rizwan-uddin .

MATHEMATICS AND COMPUTERS IN SIMULATION, 2010, 80 (07) :1509-1519

[10] RAPID MAGNETIC RECONNECTION CAUSED BY FINITE-AMPLITUDE FLUCTUATIONS [J].

MATTHAEUS, WH ;

LAMKIN, SL .

PHYSICS OF FLUIDS, 1985, 28 (01) :303-307

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