Three dimensional density cavities in guide field collisionless magnetic reconnection
2012 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 19, no 3, 032119- p.Article in journal (Refereed) Published
Particle-in-cell simulations of collisionless magnetic reconnection with a guide field reveal for the first time the three dimensional features of the low density regions along the magnetic reconnection separatrices, the so-called cavities. It is found that structures with further lower density develop within the cavities. Because their appearance is similar to the rib shape, these formations are here called low density ribs. Their location remains approximately fixed in time and their density progressively decreases, as electron currents along the cavities evacuate them. They develop along the magnetic field lines and are supported by a strong perpendicular electric field that oscillates in space. In addition, bipolar parallel electric field structures form as isolated spheres between the cavities and the outflow plasma, along the direction of the low density ribs and of magnetic field lines.
Place, publisher, year, edition, pages
2012. Vol. 19, no 3, 032119- p.
IdentifiersURN: urn:nbn:se:kth:diva-95125DOI: 10.1063/1.3697976ISI: 000302226500026ScopusID: 2-s2.0-84861583044OAI: oai:DiVA.org:kth-95125DiVA: diva2:526773
FunderEU, European Research Council, 263340
QC 201205152012-05-152012-05-142012-05-15Bibliographically approved