Библиографическое описание:Scaling of the inner electron diffusion region in collisionless magnetic reconnection / A. Divin [et al.]. - Текст : непосредственный // J. Geophys. Res-Space Phys. - 2012. - Vol. 117. - Cited Reference Count: 43. - Гранты: The present work is supported partially by the Onderzoekfonds KU Leuven (Research Fund KU Leuven), by the NASA MMS grant NNX08AO84G and by the European Commission's Seventh Framework Programme (FP7/2007-2013) under the grant agreement 263340 (SWIFF project, www. swiff. eu) and 269198 - Geoplasmas (Marie Curie International Research Staff Exchange Scheme). Additional support is provided by RFBR grants 09-05-91000-ANF-a, 12-05-00152-a and 12-05-00918-a, Austrian Science Fund project T193-N16 and by SPSU grants 11.38.47.2011 and 11.38.84.2012. The simulations were conducted on the resources of the Vlaams Supercomputer Centrum (VSC) at the Katholieke Universiteit Leuven. The authors wish to thank the reviewers for their comments that helped to improve the manuscript. - Финансирующая организация: Onderzoekfonds KU Leuven; NASA MMS [NNX08AO84G]; European Commission [263340, 269198]; RFBR [09-05-91000-ANF-a, 12-05-00152-a, 12-05-00918-a]; Austrian Science Fund [T193-N16]; SPSU [11.38.47.2011, 11.38.84.2012]. - JUN 12. - ISSN 2169-9380, DOI 10.1029/2011JA017464.
Аннотация:The Sweet-Parker analysis of the inner electron diffusion region of collisionless magnetic reconnection is presented. The study includes charged particles motion near the X-line and an appropriate approximation of the off-diagonal term for the electron pressure tensor. The obtained scaling shows that the width of the inner electron diffusion region is equal to the electron inertial length, and that electrons are accelerated up to the electron Alfven velocity in X-line direction. The estimated effective plasma conductivity is based on the electron gyrofrequency rather than the binary collision frequency, and gives the extreme (minimal) value of the plasma conductivity similar to Bohm diffusion. The scaling properties are verified by means of Particle-in-Cell simulations. An ad hoc parameter needs to be introduced to the scaling relations in order to better match the theory and simulations.
