Anomalous Heating and Plasmoid Formation in a Driven Magnetic Reconnection Experiment
| Autor: | Roland Smith, Andrea Ciardi, George Swadling, Nicolas Niasse, Jian Wu, Jingtan Ma, Sergey Lebedev, Q. Yang, Francisco Suzuki-Vidal, Jack Hare, N. F F. Loureiro, T. Robinson, Jeremy Chittenden, Nicholas Stuart, G. C. Burdiak, C. Garcia, Thomas Clayson, Lee Suttle |
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| Přispěvatelé: | Blackett Laboratory, Imperial College London, Massachusetts Institute of Technology (MIT), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Northwest Institute of Nuclear Technology [Xi'an] (NINT), Xi'an Jiaotong University (Xjtu), China Academy of Engineering Physics (CAEP), École normale supérieure - Paris (ENS-PSL), Engineering & Physical Science Research Council (EPSRC), U.S Department of Energy |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
General Physics
Field (physics) Thomson scattering Physics Multidisciplinary General Physics and Astronomy FOS: Physical sciences Plasmoid 01 natural sciences 09 Engineering 010305 fluids & plasmas symbols.namesake Physics::Plasma Physics physics.plasm-ph 0103 physical sciences Faraday effect Astrophysics::Solar and Stellar Astrophysics 010306 general physics 01 Mathematical Sciences Physics [PHYS]Physics [physics] Science & Technology 02 Physical Sciences Magnetic reconnection Plasma Physics - Plasma Physics Magnetic field Plasma Physics (physics.plasm-ph) Physical Sciences Physics::Space Physics symbols Electron temperature Atomic physics |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2017, 118 (8), pp.085001. ⟨10.1103/PhysRevLett.118.085001⟩ Physical Review Letters, 2017, 118 (8), pp.085001. ⟨10.1103/PhysRevLett.118.085001⟩ |
| ISSN: | 0031-9007 1079-7114 |
| Popis: | We present a detailed study of magnetic reconnection in a quasi-two-dimensional pulsed-power driven laboratory experiment. Oppositely directed magnetic fields $(B=3$ T), advected by supersonic, sub-Alfv\'enic carbon plasma flows $(V_{in}=50$ km/s), are brought together and mutually annihilate inside a thin current layer ($\delta=0.6$ mm). Temporally and spatially resolved optical diagnostics, including interferometry, Faraday rotation imaging and Thomson scattering, allow us to determine the structure and dynamics of this layer, the nature of the inflows and outflows and the detailed energy partition during the reconnection process. We measure high electron and ion temperatures $(T_e=100$ eV, $T_i=600$ eV), far in excess of what can be attributed to classical (Spitzer) resistive and viscous dissipation. We observe the repeated formation and ejection of plasmoids, which we interpret as evidence of two-fluid effects in our experiment. Comment: Accepted for publication in PRL, expected 17th Febuary 2017. 6 pages, 5 figures |
| Databáze: | OpenAIRE |
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