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Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment

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conference contribution
posted on 16.12.2016, 10:04 by S. R. Cash, J. A. Davies, E. Kolesnikova, T. R. Robinson, D. M. Wright, T. K. Yeoman, R. J. Strangeway
A 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.

History

Citation

Annales Geophysicae (2002) 20: 1499–1507

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Source

10th International EISCAT Workshop, TOKYO, JAPAN

Version

VoR (Version of Record)

Published in

Annales Geophysicae (2002) 20: 1499–1507

Publisher

European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)

issn

0992-7689

eissn

1432-0576

Acceptance date

17/07/2002

Copyright date

2002

Available date

16/12/2016

Publisher version

http://www.ann-geophys.net/20/1499/2002/

Temporal coverage: start date

23/07/2001

Temporal coverage: end date

27/07/2001

Language

en