TITLE

Electron response to collisionless magnetic reconnection

AUTHOR(S)
Perona, A.; Eriksson, L.-G.; Grasso, D.
PUB. DATE
April 2010
SOURCE
Physics of Plasmas;Apr2010, Vol. 17 Issue 4, p042104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A gyrokinetic test particle code, based on a relativistic Hamiltonian guiding-center formulation, has been developed in order to investigate the behavior of an electron population during a collisionless magnetic reconnection event. The reconstruction of the electron distribution function allows for a detailed comparison between the fluid quantities and the corresponding kinetic moments. Numerical simulations show that, during the linear stage, the growth rates are in agreement, the kinetic density evolves according to the fluid vorticity, and the parallel kinetic temperature remains uniformly distributed in the spatial domain. Only during the nonlinear stage, hotter regions are observed in the magnetic island. The rise in the temperature is associated with a deformation of the electron distribution function, which, however, does not present highly energetic or relativistic tails. This result provides a preliminary indication to which phase of the process the fluid reconnection model assumption of isothermal electrons is valid.
ACCESSION #
50174276

 

Related Articles

  • Magnetic reconnection during collisionless, stressed, X-point collapse using particle-in-cell simulation. Tsiklauri, D.; Haruki, T. // Physics of Plasmas;Nov2007, Vol. 14 Issue 11, p112905 

    Magnetic reconnection during collisionless, stressed, X-point collapse was studied using a kinetic, 2.5D, fully electromagnetic, relativistic particle-in-cell numerical code. Two cases of weakly and strongly stressed X-point collapse were considered. Here the descriptors “weakly” and...

  • Numerical investigation of a compressible gyrofluid model for collisionless magnetic reconnection. Comisso, L.; Grasso, D.; Tassi, E.; Waelbroeck, F. L. // Physics of Plasmas;Apr2012, Vol. 19 Issue 4, p042103 

    Ion Larmor radius effects on collisionless magnetic reconnection in the presence of a guide field are investigated by means of numerical simulations based on a gyrofluid model for compressible plasmas. Compressibility along the magnetic field is seen to favour the distribution of ion guiding...

  • Extending the collisional fluid equations into the long mean-free-path regime in toroidal plasmas. III. Parallel heat conduction. Shaing, K. C. // Physics of Plasmas;Sep2006, Vol. 13 Issue 9, p092504 

    It is illustrated that plasma transport processes in the direction of the magnetic field are local in the vicinity of the magnetic island in the long mean-free-path regime where the collisionality parameter ν* is larger than 10-2, and the width of the island is about 3% of the minor radius or...

  • Barriers in the transition to global chaos in collisionless magnetic reconnection. II. Field line spectroscopy. Borgogno, D.; Grasso, D.; Pegoraro, F.; Schep, T. J. // Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102308 

    The transitional phase from local to global chaos in the magnetic field of a reconnecting current layer is investigated. The identification of the ridges in the field of the finite time Lyapunov exponent as barriers to the field line motion is carried out adopting the technique of field line...

  • Physical processes of driven magnetic reconnection in collisionless plasmas: Zero guide field case. Cheng, C. Z.; Inoue, S.; Ono, Y.; Horiuchi, R. // Physics of Plasmas;2015, Vol. 22 Issue 10, p1 

    The key physical processes of the electron and ion dynamics, the structure of the electric and magnetic fields, and how particles gain energy in the driven magnetic reconnection in collisionless plasmas for the zero guide field case are presented. The key kinetic physics is the decoupling of...

  • Collisionless magnetic reconnection in a plasmoid chain. Markidis, S.; Henri, P.; Lapenta, G.; Divin, A.; Goldman, M. V.; Newman, D.; Eriksson, S. // Nonlinear Processes in Geophysics;2012, Vol. 19 Issue 1, p145 

    The kinetic features of plasmoid chain formation and evolution are investigated by two dimensional Particlein-Cell simulations. Magnetic reconnection is initiated in multiple X points by the tearing instability. Plasmoids form and grow in size by continuously coalescing. Each chain plasmoid...

  • Collisionless magnetic reconnection in the presence of a sheared velocity field. Faganello, M.; Pegoraro, F.; Califano, F.; Marradi, L. // Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p062102 

    The linear theory of magnetic field lines reconnection in a two-dimensional configuration in the presence of a (Kelvin–Helmholtz stable) sheared velocity field is investigated within a single fluid model, where the onset of magnetic field line reconnection is made possible by the effect...

  • Recent Evolution in the Theory of Magnetic Reconnection and Its Connection with Turbulence. Karimabadi, Homa; Roytershteyn, Vadim; Daughton, William; Liu, Yi-Hsin // Space Science Reviews;Oct2013, Vol. 178 Issue 2-4, p307 

    The concept of reconnection is found in many fields of physics with the closest analogue to magnetic reconnection being the reconnection of vortex tubes in hydrodynamics. In plasmas, magnetic reconnection plays an important role in release of energy associated with the magnetic shear into...

  • On the role of a nonscalar electron pressure in the collisionless magnetic reconnection. Hosseinpour, M.; Vekstein, G. // Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p114505 

    Collisionless tearing instability in a sheared force-free magnetic field is considered in the framework of electron magnetohydrodynamics. A rigorous analytical analysis demonstrates that the bulk inertia of electrons is the dominant reconnection mechanism in a sufficiently low-β plasma, when...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics