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Energetics of Kinetic Reconnection in a Three-Dimensional Null-Point Cluster
KTH, School of Computer Science and Communication (CSC), High Performance Computing and Visualization (HPCViz).ORCID iD: 0000-0003-0639-0639
2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 111, no 4, 045002- p.Article in journal (Refereed) Published
Abstract [en]

We perform three-dimensional particle-in-cell simulations of magnetic reconnection with multiple magnetic null points. Magnetic field energy conversion into kinetic energy is about five times higher than in traditional Harris sheet configuration. More than 85% of initial magnetic field energy is transferred to particle energy during 25 reversed ion cyclofrequencies. Magnetic reconnection in the cluster of null points evolves in three phases. During the first phase, ion beams are excited, then give part of their energy back to the magnetic field in the second phase. In the third phase, magnetic reconnection occurs in many small patches around the current channels formed along the stripes of a low magnetic field. Magnetic reconnection in null points essentially presents three-dimensional features, with no two-dimensional symmetries or current sheets.

Place, publisher, year, edition, pages
2013. Vol. 111, no 4, 045002- p.
Keyword [en]
Current sheets, Harris sheets, Low magnetic fields, Magnetic field energy, Magnetic null points, Magnetic reconnections, Particle energy, Particle-in-cell simulations
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-127499DOI: 10.1103/PhysRevLett.111.045002ISI: 000322218000007Scopus ID: 2-s2.0-84880914444OAI: oai:DiVA.org:kth-127499DiVA: diva2:644794
Funder
EU, FP7, Seventh Framework Programme, 2633430
Note

QC 20130902

Available from: 2013-09-02 Created: 2013-08-30 Last updated: 2017-12-06Bibliographically approved

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Markidis, Stefano

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