HR: 1340h
AN: SM43A-1211 [Abstracts]
TI: In Situ Detection of Coherent Vortices as a Manifestation of Alfvenic Turbulence
AU: * Sundkvist, D
EM: davids@irfu.se
AF: Laboratoire de Physique et Chimie de l'Environnement, CNRS, 3A, Avenue de la recherche scientifique,
Orleans, 45071
France
AU: * Sundkvist, D
EM: davids@irfu.se
AF: Swedish Institute of Space Physics, Box 537, Uppsala, SE-751 21
Sweden
AU: Krasnoselskikh, V
EM: vkrasnos@cnrs-orleans.fr
AF: Laboratoire de Physique et Chimie de l'Environnement, CNRS, 3A, Avenue de la recherche scientifique,
Orleans, 45071
France
AU: Shukla, P K
EM: ps@tp4.ruhr-uni-bochum.de
AF: Institut fr Theoretische Physik IV, Ruhr-Universitt Bochum, Bochum, D-44780
Germany
AU: Vaivads, A
EM: andris@irfu.se
AF: Swedish Institute of Space Physics, Box 537, Uppsala, SE-751 21
Sweden
AU: Andr, M
EM: ma@irfu.se
AF: Swedish Institute of Space Physics, Box 537, Uppsala, SE-751 21
Sweden
AU: Buchert, S
EM: scb@irfu.se
AF: Swedish Institute of Space Physics, Box 537, Uppsala, SE-751 21
Sweden
AU: Rme, H
SM43A-1211
AF: Centre d'Etude Spatiale des Rayonnements, 9, avenue du Colonel Roche, Toulouse, 31029
France
AB:
It is generally believed that spatially coherent vortex structures can spontaneously form in space and laboratory turbulent
plasmas due to mode couplings of different scale perturbations. Although theoretical predictions on their properties are
numerous, direct detailed measurements of such structures in turbulent plasmas have been absent. We unambiguously show for
the first time the existence of spatially coherent drift-Alfvén vortices and vortex chains in a turbulent space plasma,
using simultaneous multi-point measurements of the Cluster satellites in the magnetospheric cusp.
Moreover we present clear indications that vortex structures exist on several spatial scales. The vortices represent
``elementary entities" of drift-Alfvén wave turbulence in magnetized plasmas and their presence has far-reaching
implications on turbulent cross-field transport.
DE: 4400 NONLINEAR GEOPHYSICS (3200, 6944, 7839)
DE: 4490 Turbulence (3379, 4568, 7863)
DE: 7829 Kinetic waves and instabilities
DE: 7859 Transport processes
DE: 7863 Turbulence (4490)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005