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Title: Exploring the nature of collisionless shocks under laboratory conditions
Authors: Stockem, A.
Fiuza, F.
Bret, A.
Fonseca, R. A.
Silva, L. O.
Issue Date: 2014
Publisher: Nature Publishing Group
Abstract: Collisionless shocks are pervasive in astrophysics and they are critical to understand cosmic ray acceleration. Laboratory experiments with intense lasers are now opening the way to explore and characterise the underlying microphysics, which determine the acceleration process of collisionless shocks. We determine the shock character – electrostatic or electromagnetic – based on the stability of electrostatic shocks to transverse electromagnetic fluctuations as a function of the electron temperature and flow velocity of the plasma components, and we compare the analytical model with particle-in-cell simulations. By making the connection with the laser parameters driving the plasma flows, we demonstrate that shocks with different and distinct underlying microphysics can be explored in the laboratory with state-of-the-art laser systems.
Peer reviewed: yes
DOI: 10.1038/srep03934
ISSN: 2045-2322
Accession number: WOS:000331215400005
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica

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