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Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment
conference contribution
posted on 2016-12-16, 10:04 authored by S. R. Cash, J. A. Davies, E. Kolesnikova, T. R. Robinson, D. M. Wright, T. K. Yeoman, R. J. StrangewayA quantitative analysis is presented of the FAST satellite electric field and particle flux data during an EISCAT heating experiment run on 8 October 1998. Radio frequency heating, modulated at 3 Hz, launched ULF waves from the ionosphere into the lower magnetosphere. The ULF waves were observed in FAST data and constituted the first satellite detection of artificially excited Alfvénic ULF waves. The downward electron flux data for this event contain the first observations of electrons undergoing acceleration within the Ionospheric Alfvén Resonator (IAR) due to parallel electric fields associated with an artificially stimulated Alfvén wave. The time history and spectral content of the observed down-ward electron fluxes is investigated by considering the effects of a localised parallel electric field. Furthermore, it is demonstrated that a power law electron energy distribution describes the time-variable observed fluxes better than a Maxwellian distribution.
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Citation
Annales Geophysicae (2002) 20: 1499–1507Author affiliation
/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and AstronomySource
10th International EISCAT Workshop, TOKYO, JAPANVersion
- VoR (Version of Record)
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Annales Geophysicae (2002) 20: 1499–1507Publisher
European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)issn
0992-7689eissn
1432-0576Acceptance date
2002-07-17Copyright date
2002Available date
2016-12-16Publisher DOI
Publisher version
http://www.ann-geophys.net/20/1499/2002/Temporal coverage: start date
2001-07-23Temporal coverage: end date
2001-07-27Language
enAdministrator link
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Science & TechnologyPhysical SciencesAstronomy & AstrophysicsGeosciences, MultidisciplinaryMeteorology & Atmospheric SciencesGeologyASTRONOMY & ASTROPHYSICSGEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY & ATMOSPHERIC SCIENCESionosphereactive experimentsparticle accelerationmagnetospheric physicselectric fieldsIONOSPHERIC HEATERWAVESRADAR
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