title: Chaotic dynamos generated by a turbulent flow of liquid sodium.
abstract: We report the observation of several dynamical regimes of the magnetic field generated by a turbulent flow of liquid sodium (VKS experiment). Stationary dynamos, transitions to relaxation cycles or to intermittent bursts, and random field reversals occur in a fairly small range of parameters. Large scale dynamics of the magnetic field result from the interactions of a few modes. The low dimensional nature of these dynamics is not smeared out by the very strong turbulent fluctuations of the flow.
authors.affiliation: Service de Physique de l'Etat Condensé, Direction des Sciences de la Matière, CEA-Saclay, CNRS URA 2464, 91191 Gif-sur-Yvette cedex, France.
authors.forename: F
authors.initials: F
authors.lastname: Ravelet
authors.forename: M
authors.initials: M
authors.lastname: Berhanu
authors.forename: R
authors.initials: R
authors.lastname: Monchaux
authors.forename: S
authors.initials: S
authors.lastname: Aumaître
authors.forename: A
authors.initials: A
authors.lastname: Chiffaudel
authors.forename: F
authors.initials: F
authors.lastname: Daviaud
authors.forename: B
authors.initials: B
authors.lastname: Dubrulle
authors.forename: M
authors.initials: M
authors.lastname: Bourgoin
authors.forename: Ph
authors.initials: P
authors.lastname: Odier
authors.forename: N
authors.initials: N
authors.lastname: Plihon
authors.forename: J-F
authors.initials: JF
authors.lastname: Pinton
authors.forename: R
authors.initials: R
authors.lastname: Volk
authors.forename: S
authors.initials: S
authors.lastname: Fauve
authors.forename: N
authors.initials: N
authors.lastname: Mordant
authors.forename: F
authors.initials: F
authors.lastname: Pétrélis