Driven magnetic reconnection near the Dreicer limit

Roytershteyn, V.; Daughton, W.; Dorfman, S.; Ren, Y.; Ji, H.; Yamada, M.; Karimabadi, H.; Yin, L.; Albright, B. J.; Bowers, K. J.
May 2010
Physics of Plasmas;May2010, Vol. 17 Issue 5, p055706
Academic Journal
The influence of Coulomb collisions on the dynamics of driven magnetic reconnection in geometry mimicking the Magnetic Reconnection eXperiment (MRX) [M. Yamada et al., Phys. Plasmas 4, 1936 (1997)] is investigated using two-dimensional (2D) fully kinetic simulations with a Monte Carlo treatment of the collision operator. For values of collisionality typical of MRX, the reconnection mechanism is shown to be a combination of collisionless effects, represented by off-diagonal terms in the electron stress tensor, and collisional momentum exchange between electrons and ions. The ratio of the reconnection electric field ER to the critical runaway field Ecrit provides a convenient measure of the relative importance of these two mechanisms. The structure of electron-scale reconnection layers in the presence of collisions is investigated in light of the previously reported [S. Dorfman et al., Phys. Plasmas 15, 102107 (2008)] discrepancy in the width of the electron reconnection layers between collisionless simulations and experimental observations. It is demonstrated that the width of the layer increases in the presence of collisions, but does not substantially deviate from its collisionless values, given by the electron crossing orbit width, unless ER


Related Articles

  • Characteristic Features of Electron�Ion Collisions in Strong Electric Fields. Balakin, A. A.; Mironov, V. A.; Fraiman, G. M. // Plasma Physics Reports;Jun2001, Vol. 27 Issue 6, p462 

    The classical motion of an electron in the Coulomb field of an ion and in a uniform external electric field is analyzed. A nondimensionalization method that makes it possible to study electron motion in arbitrarily strong electric fields is proposed. The possible electron trajectories in the...

  • Trapped electron stabilization of ballooning modes in low aspect ratio toroidal plasmas. Cheng, C. Z.; Gorelenkov, N. N. // Physics of Plasmas;Oct2004, Vol. 11 Issue 10, p4784 

    The kinetic effects of trapped electron dynamics and finite gyroradii and magnetic drift motion of ions are shown to give rise to a large parallel electric field and hence a parallel current that greatly enhances the stabilizing effect of field line tension for ballooning modes in low aspect...

  • Collective behavior of ion Bernstein waves in a multi-ion-species plasma. Toida, Mieko; Suzuki, Takamasa; Ohsawa, Yukiharu // Physics of Plasmas;Jun2004, Vol. 11 Issue 6, p3028 

    Collective behavior of ion Bernstein waves propagating perpendicular to an external magnetic field is studied with attention to the effect of multiple-ion species. In a thermal-equilibrium, multi-ion-species plasma, a great number of Bernstein waves are excited near the harmonics of many...

  • Modelling of dusty plasmas: A+M data needs. Goedheer, W. J.; De Bleecker, K. // AIP Conference Proceedings;2005, Vol. 771 Issue 1, p118 

    Processing plasmas often produce clusters, ranging in size from a few nanometer up to micrometers. Due to their negative charge, clusters are confined by the sheath electric fields until their mass enables gravity to pull them out of the discharge. Examples are discharges in SiH4 or C2H2....

  • Plasma in a high-frequency electric field with a reflective condition on the boundary. Latyshev, A.; Yushkanov, A. // Fluid Dynamics;Jan2006, Vol. 41 Issue 1, p161 

    An analytical solution is obtained for the linearized problem of the behavior of a collisional gas plasma in a half-space in an external alternating electric field. It is assumed that the electrons are mirror-reflected from the plasma boundary. The solution is used for finding the screened...

  • Two-surface wave decay: improved analytical theory and effects on electron acceleration. Macchi, A.; Battaglini, M.; Cattani, F.; Cornolti, F. // Applied Physics B: Lasers & Optics;May/Jun2004, Vol. 78 Issue 7/8, p915 

    Two-surface wave decay (TSWD), i.e., the parametric excitation of electron surface waves, was recently proposed as an absorption mechanism in the interaction of ultrashort, intense laser pulses with solid targets. We present an extension of the fluid theory of TSWD to a warm plasma that treats...

  • Sheath and presheath in a collisionless plasma with a Maxwellian source. Scheuer, J. T.; Emmert, G. A. // Physics of Fluids (00319171);Dec88, Vol. 31 Issue 12, p3645 

    Bissell and Johnson [Phys. Fluids 30, 779 (1987)] have calculated the electrostatic potential variation in the sheath and presheath regions of a collisionless plasma in which the source of ions is assumed to be Maxwellian. To do this, they imposed the generalized Bohm criterion as a boundary...

  • A Planar Relativistic Electron Beam in a Plasma Channel Bounded by Conducting Walls. Kuryshev, A. P.; Andreev, V. D. // Technical Physics;Sep2001, Vol. 46 Issue 9, p1151 

    The force interaction of a relativistic electron beam with a plasma in a channel bounded by planegeometry highly conducting walls is studied. The steady-state interaction regime, ? = ku, is analyzed using the model of a cold collisional electron plasma. The formulas for the transverse component...

  • Measurements of Plasma Expansion due to Background Gas in the Electron Diffusion Gauge Experiment. Morrison, Kyla A.; Paul, Stephen F.; Davidson, Ronald C. // AIP Conference Proceedings;2003, Vol. 692 Issue 1, p75 

    The expansion of pure electron plasmas due to collisions with background neutral gas atoms in the Electron Diffusion Gauge experiment device is observed. Measurements of plasma expansion with the new, phosphor-screen density diagnostic suggest that the expansion rates measured previously were...


Read the Article


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

Try another library?
Sign out of this library

Other Topics