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A magnetospheric generator driving ion and electron acceleration and electric currents in a discrete auroral arc observed by Cluster and DMSP

dc.contributor.authorEchim, M.M.
dc.contributor.authorMaggiolo, R.
dc.contributor.authorRoth, M.
dc.contributor.authorDe Keyser, J.
dc.date2009
dc.date.accessioned2016-04-05T12:42:18Z
dc.date.available2016-04-05T12:42:18Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3284
dc.descriptionSimultaneous observations on April 28, 2001 by Cluster and DMSP-F14 reveal a stable discrete auroral arc and fluxes of field-aligned accelerated electrons and ions coincident with a magnetospheric plasma interface at an altitude of 4.5 RE in the dusk sector. We compare satellite data with a quasi-stationary magnetosphere-ionosphere coupling model based on a Vlasov solution for the magnetospheric generator. The model provides a self-consistent magnetospheric electric potential matching the Cluster observations. The ionospheric potential is derived from the current continuity equation and gives a field-aligned potential drop and a flux of precipitating energy in agreement with the DMSP data. Model results and data analysis suggest a quasi-stationary field-aligned acceleration of auroral electrons and ions with a magnetospheric generator. We associate the generator with the convergent perpendicular electric field at the interface of the plasma sheet boundary layer with the lobe or at the inner edge of the low latitude boundary layer. Copyright 2009 by the American Geophysical Union.
dc.languageeng
dc.titleA magnetospheric generator driving ion and electron acceleration and electric currents in a discrete auroral arc observed by Cluster and DMSP
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeAccelerated electrons
dc.subject.freeAuroral arcs
dc.subject.freeAuroral electrons
dc.subject.freeCluster observations
dc.subject.freeCurrent continuity
dc.subject.freeData analysis
dc.subject.freeDusk sector
dc.subject.freeElectron acceleration
dc.subject.freeIonospheric potential
dc.subject.freeLow latitude boundary layer
dc.subject.freeMagnetosphere-ionosphere coupling
dc.subject.freeMagnetospheric plasmas
dc.subject.freeModel results
dc.subject.freePlasma sheet boundary layer
dc.subject.freePotential drop
dc.subject.freeQuasi-stationary
dc.subject.freeSatellite data
dc.subject.freeSimultaneous observation
dc.subject.freeVlasov solution
dc.subject.freeBoundary layers
dc.subject.freeCavity resonators
dc.subject.freeElectric fields
dc.subject.freeElectric potential
dc.subject.freeIonosphere
dc.subject.freeIons
dc.subject.freeMagnetosphere
dc.subject.freePlasma sheaths
dc.subject.freeElectric generators
dc.subject.freeatmospheric electricity
dc.subject.freeaurora
dc.subject.freeboundary layer
dc.subject.freedata set
dc.subject.freedimethylsulfoniopropionate
dc.subject.freeelectric field
dc.subject.freeelectron
dc.subject.freeion
dc.subject.freeionosphere
dc.subject.freemagnetosphere
dc.subject.freeplasma
dc.subject.freesatellite data
dc.source.titleGeophysical Research Letters
dc.source.volume36
dc.source.issue12
dc.source.pageL12111
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2009GL038343
dc.identifier.scopus2-s2.0-68749089627


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