TITLE

Particle description of the electron diffusion region in collisionless magnetic reconnection

AUTHOR(S)
Fujimoto, Keizo; Sydora, Richard D.
PUB. DATE
November 2009
SOURCE
Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p112309
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The present study clarifies the dissipation mechanism of collisionless magnetic reconnection in two-dimensional system based on particle dynamics. The electrons are accelerated without thermalization in the electron diffusion region, carry out the meandering oscillation, and are ejected away from the X-line. This electron behavior not only generates the electron inertia resistivity based on the particle description, but also it can be the origin of the electron viscosity resulting in the off-diagonal pressure tensor term in the generalized Ohm’s law near the X-line. We derive an analytical profile for the electron pressure tensor term and confirm that the profile is consistent with the particle-in-cell simulation. The present results demonstrate that the magnetic dissipation due to the electron viscosity in the fluid picture is equivalent to that due to the inertia resistivity in the particle description. It is also suggested that the width of the electron current sheet is on the order of the electron inertia length in the case without electron scattering and thermalization, while it is expected that the width is broadened if the electron scattering occurs in the current sheet.
ACCESSION #
45515205

 

Related Articles

  • Fast magnetic reconnection with large guide fields. Stanier, A.; Simakov, Andrei N.; Chacón, L.; Daughton, W. // Physics of Plasmas;2015, Vol. 22 Issue 1, p1 

    In this letter, it is demonstrated using two-fluid simulations that low-β magnetic reconnection remains fast, regardless of the presence of fast dispersive waves, which have been previously suggested to play a critical role. To understand these results, a discrete model is constructed that...

  • Fluid vs. kinetic magnetic reconnection with strong guide fields. Stanier, A.; Simakov, Andrei N.; Chacón, L.; Daughton, W. // Physics of Plasmas;2015, Vol. 22 Issue 10, p1 

    The fast rates of magnetic reconnection found in both nature and experiments are important to understand theoretically. Recently, it was demonstrated that two-fluid magnetic reconnection remains fast in the strong guide field regime, regardless of the presence of fast-dispersive waves. This...

  • Erratum to: Visco-Resistive Dissipation in Strongly Driven Transient Reconnection. Armstrong, C. K.; Craig, I. J. D. // Solar Physics;Mar2014, Vol. 289 Issue 3, p879 

    No abstract available.

  • Nonlinear magnetic reconnection with collisionless dissipation. Vekstein, G.E.; Priest, E.R. // Physics of Plasmas;Aug95, Vol. 2 Issue 8, p3169 

    Presents an analytical model of two-dimensional collisionless reconnection in an X-type magnetic geometry. Conversion of magnetic energy to the kinetic energy of accelerated ions in the vicinity of the neutral line; Structure of the dissipation region and the magnetic energy release rate for...

  • Analytic solutions of the magnetic annihilation and reconnection problems. I. Planar flow profiles. Watson, P.G.; Craig, I.J.D. // Physics of Plasmas;Jan1997, Vol. 4 Issue 1, p101 

    Focuses on the phenomena of steady-state magnetic annihilation and reconnection in the vicinity of magnetic nulls. Derivation of reconnective solutions; Classification of magnetic dissipation mechanisms; Discussion on more complicated three-dimensional flow patterns.

  • Analytic solutions of the magnetic annihilation and reconnection problems. II. Three-dimensional... Watson, P.G.; Craig, I.J.D. // Physics of Plasmas;Jan1997, Vol. 4 Issue 1, p110 

    Discusses the construction of analytic solutions for magnetic annihilation and reconnection in three-dimensional velocity fields. Ohmic dissipation rates for certain reconnection solutions; Features of the models not contained in two-dimensional planar reconnection solutions; Expression which...

  • Kinetic regimes of high frequency magnetic reconnection in a neutral sheet configuration. Attico, N.; Califano, F.; Pegoraro, F. // Physics of Plasmas;Feb2002, Vol. 9 Issue 2, p458 

    A collisionless plasma configuration with a neutral magnetic sheet allows a fast electron tearing mode to grow due to a resonant wave–particle interaction near the null line. Using a fully kinetic treatment, a set of dispersion equations that bridges the resonant tearing mode and the...

  • Dissipation in magnetic reconnection with a guide magnetic field. Hesse, Michael // Physics of Plasmas;Dec2006, Vol. 13 Issue 12, p122107 

    A combination of numerical simulation results and analytical theory is applied to the problem of magnetic reconnection in a guide magnetic field. An investigation of electron distribution functions within the electron diffusion region leads to a picture of mixing of particles with different...

  • Dissipation mechanism in 3D magnetic reconnection. Fujimoto, Keizo // Physics of Plasmas;Nov2011, Vol. 18 Issue 11, p111206 

    Dissipation processes responsible for fast magnetic reconnection in collisionless plasmas are investigated using 3D electromagnetic particle-in-cell simulations. The present study revisits the two simulation runs performed in the previous study (Fujimoto, Phys. Plasmas 16, 042103 (2009)); one...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics