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Model of the energization of outer-zone electrons by whistler-mode chorus during the October 9, 1990 geomagnetic storm

dc.contributor.authorSummers, D.
dc.contributor.authorMa, C.
dc.contributor.authorMeredith, N.P.
dc.contributor.authorHorne, R.B.
dc.contributor.authorThorne, R.M.
dc.contributor.authorHeynderickx, D.
dc.contributor.authorAnderson, R.R.
dc.date2002
dc.date.accessioned2017-05-03T12:11:07Z
dc.date.available2017-05-03T12:11:07Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/5195
dc.descriptionRelativistic (>1 MeV) 'killer electrons' are frequently generated in the Earth's inner magnetosphere during the recovery phase of a typical magnetic storm. We test the hypothesis that the energization of electrons takes place by means of stochastic gyroresonant interaction between lower-energy (several 100 keV) seed electrons and whistler-mode chorus waves. We develop a model kinetic equation for the electron energy distribution, and utilize both electron and whistler-mode wave data at L = 4 for a typical geomagnetic storm (on October 9, 1990) from instruments carried on the Combined Release and Radiation Effects Satellite (CRRES). Our model solutions are found to match well with the CRRES profiles of the electron flux. We conclude that the mechanism of stochastic acceleration by whistler-mode turbulence is a viable candidate for generating killer electrons, not only for the storm considered, but for similar storms with a several-day recovery phase containing prolonged substorm activity.
dc.languageeng
dc.titleModel of the energization of outer-zone electrons by whistler-mode chorus during the October 9, 1990 geomagnetic storm
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeElectron energy levels
dc.subject.freeMagnetosphere
dc.subject.freeSatellites
dc.subject.freeStorms
dc.subject.freeElectron energy levels
dc.subject.freeElectrons
dc.subject.freeGeomagnetism
dc.subject.freeIntegral equations
dc.subject.freeMagnetosphere
dc.subject.freeRadiation effects
dc.subject.freeStochastic systems
dc.subject.freeStorms
dc.subject.freeMagnetic storms
dc.subject.freeGeomagnetism
dc.subject.freeAtmospherics
dc.subject.freeatmospheric electricity
dc.subject.freegeomagnetic storm
dc.subject.freemagnetosphere
dc.subject.freeElectron energy distributions
dc.subject.freeGeomagnetic storm
dc.subject.freeInner magnetosphere
dc.subject.freeModel kinetic equations
dc.subject.freeStochastic acceleration
dc.subject.freeSubstorm activity
dc.subject.freeWhistler-mode chorus
dc.subject.freeWhistler-mode waves
dc.source.titleGeophysical Research Letters
dc.source.volume29
dc.source.issue24
dc.source.pageA2174
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2002GL016039
dc.identifier.scopus2-s2.0-0038404906


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