TITLE

Particle-in-cell simulation of collisionless reconnection with open outflow boundaries

AUTHOR(S)
Klimas, Alex; Hesse, Michael; Zenitani, Seiji
PUB. DATE
August 2008
SOURCE
Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p082102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A new method for applying open boundary conditions in particle-in-cell (PIC) simulations is utilized to study magnetic reconnection. Particle distributions are assumed to have zero normal derivatives at the boundaries. Advantages and possible limitations of this method for PIC simulations are discussed. Results from a reconnection simulation study are presented. For the purpose of this investigation, a 2 12-dimensional electromagnetic PIC simulation using open conditions at the outflow boundaries and simple reflecting boundaries to the inflow regions is discussed. The electron diffusion region is defined as that region where the out-of-plane electron inertial electric field is positive indicating acceleration and flux transfer; the evolution of this region is analyzed. It is found that this region varies in the range 2.5–4 local electron inertial lengths in total width and in the range 10–15 local electron inertial lengths in total length for the mass ratio 25. The reconnection rate is investigated in terms of the aspect ratio of the electron diffusion region plus inflow and outflow measures at its boundaries. It is shown that a properly measured aspect ratio predicts the flux transfer rate, scaled to account for the decline in field strength and electron density at the inflow boundary to the electron diffusion region. It is concluded that this electron diffusion region either adjusts its aspect ratio for compatibility with the flux transfer rate that is set elsewhere, as in the Hall reconnection model, or that it is this region that controls the reconnection flux transfer rate.
ACCESSION #
34169280

 

Related Articles

  • The bimodal distribution structure of electron density brought about by the Hall effect in the electron diffusion region during magnetic reconnection. Huang, F. C.; Sheng, Z. M.; Ma, Z. W. // Physics of Plasmas;Jun2007, Vol. 14 Issue 6, p062901 

    The Hall effect is suggested to be responsible for decoupling of electrons and ions in plasma during magnetic reconnection. It leads to redistribution of charged particles during magnetic reconnection. In this paper, charge distribution brought about by the Hall effect during magnetic...

  • The dynamics of electron and ion holes in a collisionless plasma. Eliasson, B.; Shukla, P. K.; McKenzie, J. F. // Nonlinear Processes in Geophysics;2005, Vol. 12 Issue 2, p269 

    We present a review of recent analytical and numerical studies of the dynamics of electron and ion holes in a collisionless plasma. The new results are based on the class of analytic solutions which were found by Schamel more than three decades ago, and which here work as initial conditions to...

  • On the electron energy distribution function in a Hall-type thruster. Fedotov, V. Yu.; Ivanov, A. A.; Guerrini, G.; Vesselovzorov, A.N.; Bacal, M. // Physics of Plasmas;Nov99, Vol. 6 Issue 11, p4360 

    Describes the measurement of the electron energy distribution function at the channel exit of a small Hall-type thruster. Interpretation of the electron energy distribution function as a beam-plasma electron distribution function with electron beam energy of several tons of electronvolts;...

  • Numerical studies of transport in the Columbia Non-neutral Torus. de Gevigney, B. Durand; Pedersen, T. Sunn; Boozer, A. H. // AIP Conference Proceedings;3/30/2009, Vol. 1114 Issue 1, p69 

    The confinement of pure electron plasmas in the Columbia Non-neutral Torus (CNT) stellarator is limited by the presence of unconfined orbits. The existence of a very large electric field across magnetic surfaces should preclude such unconfined orbits. However variations in the electric potential...

  • Low-energy high flux reactive ion etching by rf magnetron plasma. I, Lin; Hinson, D. C.; Class, W. H.; Sandstrom, R. L. // Applied Physics Letters;1984, Vol. 44 Issue 2, p185 

    The magnetron plasma etching of SiO2 and Si in fluorocarbon gas has been investigated. The plasma has high ionization degree, collisionless high density, and low energy ion flux (I∼1.0 mA/cm2, 30<=Ei <=250 eV at 1 W/cm2) and a controllable etch uniformity. The bulk of the plasma supports an...

  • Electrostatic potential behind a macroparticle in a drifting collisional plasma: Effect of plasma absorption. Chaudhuri, M.; Khrapak, S. A.; Morfill, G. E. // Physics of Plasmas;Feb2007, Vol. 14 Issue 2, p022501 

    The electric field and potential behind a small absorbing body (dust grain) at floating potential has been calculated analytically in a highly collisional drifting plasma. Linear plasma response formalism has been used and main attention has been focused on the effect of plasma absorption on the...

  • A detailed study of collisionless explosion of single- and two-ion-species spherical nanoplasmas. Popov, K. I.; Bychenkov, V. Yu.; Rozmus, W.; Ramunno, L. // Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p083110 

    The collisionless adiabatic expansion into vacuum of spherical plasma targets (clusters) composed of cold single- or multispecies ions and hot electrons is studied kinetically by numerical solving of the nonrelativistic equations of motion of plasma particles in the self-consistent electrostatic...

  • Thermal fluctuation levels of magnetic and electric fields in unmagnetized plasma: The rigorous relativistic kinetic theory. Yoon, P. H.; Schlickeiser, R.; Kolberg, U. // Physics of Plasmas;Mar2014, Vol. 21 Issue 3, p1 

    Any fully ionized collisionless plasma with finite random particle velocities contains electric and magnetic field fluctuations. The fluctuations can be of three different types: weakly damped, weakly propagating, or aperiodic. The kinetics of these fluctuations in general unmagnetized plasmas,...

  • Nonlinear structure of the electromagnetic waves in underdense plasmas. Shokri, B.; Niknam, A. R. // Physics of Plasmas;Nov2006, Vol. 13 Issue 11, p113110 

    The interaction of a high-frequency electromagnetic wave with a collisionless unmagnetized nonisothermal plasma, taking into account the ponderomotive force per unit volume acting on the plasma electrons, is studied. The electron density distribution is found. Obtaining the nonlinear...

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