Aspects of three-dimensional magnetic reconnection (Articolo in rivista)

Type
Label
  • Aspects of three-dimensional magnetic reconnection (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.1857912 (literal)
Alternative label
  • Borgogno D., Grasso D., Porcelli F., Califano F., Pegoraro F. and Farina D. (2005)
    Aspects of three-dimensional magnetic reconnection
    in Physics of plasmas
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Borgogno D., Grasso D., Porcelli F., Califano F., Pegoraro F. and Farina D. (literal)
Pagina inizio
  • 032309 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 12 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Politecn Torino, INFM, Burning Plasma Res Grp, Turin, Italy 2. Politecn Torino, Dept Energet, Turin, Italy 3. Univ Pisa, Dept Phys, I-56100 Pisa, Italy 4. INFM, Pisa, Italy 5. EURATOM, ENEA, CNR Assoc, Ist Fis Plasma, Milan, Italy (literal)
Titolo
  • Aspects of three-dimensional magnetic reconnection (literal)
Abstract
  • The nonlinear behavior of reconnecting modes in three spatial dimensions (3D) is investigated, on the basis of a collisionless fluid model in slab geometry, assuming a strong constant guide field in one direction. Unstable modes in the so-called large Delta' regime are considered. Single helicity modes, i.e., modes with the same orientation with respect to the guide field, depending on all three spatial coordinates correspond to \"oblique\" modes with, in general, mixed parity around the corresponding resonant magnetic surface, giving rise to a nonlinear drift of the magnetic island X point. The nonlinear coupling of initial perturbations with different helicities introduces additional helicities that evolve in time in agreement with quasilinear estimates, as long as their amplitudes remain relatively small. Magnetic field lines become stochastic when islands with different helicities are present. Basic questions such as the proper definition of the reconnection rate in 3D are addressed. (literal)
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