Finite-Larmor-Radius effects in the nonlinear dynamics of collisionless magnetic reconnection (Articolo in rivista)

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  • Finite-Larmor-Radius effects in the nonlinear dynamics of collisionless magnetic reconnection (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/53/3/035008 (literal)
Alternative label
  • Del Sarto, D [ 1 ] ; Marchetto, C [ 2 ] ; Pegoraro, F [ 3,4 ] ; Califano, F [ 3,4 ] (2011)
    Finite-Larmor-Radius effects in the nonlinear dynamics of collisionless magnetic reconnection
    in Plasma physics and controlled fusion (Online); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Del Sarto, D [ 1 ] ; Marchetto, C [ 2 ] ; Pegoraro, F [ 3,4 ] ; Califano, F [ 3,4 ] (literal)
Pagina inizio
  • 035008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/53/3/035008/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 53 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Nancy Univ, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France [ 2 ] IFP CNR, Assoc EURATOM ENEA Fus, I-20125 Milan, Italy [ 3 ] Univ Pisa, Dept Phys, I-56127 Pisa, Italy [ 4 ] Univ Pisa, CNISM, I-56127 Pisa, Italy (literal)
Titolo
  • Finite-Larmor-Radius effects in the nonlinear dynamics of collisionless magnetic reconnection (literal)
Abstract
  • We provide numerical evidence of the role of finite Larmor radius effects in the nonlinear dynamics of magnetic field line reconnection in high-temperature, strong guide field plasmas in a slab configuration, in the large Delta' regime. Both ion and electron temperature effects introduce internal energy variations related to mechanical compression terms in the energy balance, thus contributing to regularize the gradients of the ion density with respect to the cold regimes. For values of the Larmor radii that are not asymptotically small, the two temperature effects are no longer interchangeable, in contrast to what is expected from linear theory, and the differences are measurable in the numerical growth rates and in the nonlinear evolution of the density layers. We interpret such differences in terms of the change, due to ion temperature effects, of the Lagrangian advection of the 'plasma invariants' that are encountered in the cold-ion, warm-electron regime. The different roles of the ion and ion-sound Larmor radii in the reconnection dynamics near the X- and O-points are evidenced by means of a local quadratic expansion of the fields. (literal)
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