Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment
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...
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Online Access: | https://doi.org/10.5194/angeo-20-1499-2002 https://doaj.org/article/cfb2975a79974242a716214aaa18f8b0 |
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ftdoajarticles:oai:doaj.org/article:cfb2975a79974242a716214aaa18f8b0 2023-05-15T16:04:31+02:00 Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment S. R. Cash J. A. Davies E. Kolesnikova T. R. Robinson D. M. Wright T. K. Yeoman R. J. Strangeway 2002-09-01T00:00:00Z https://doi.org/10.5194/angeo-20-1499-2002 https://doaj.org/article/cfb2975a79974242a716214aaa18f8b0 EN eng Copernicus Publications https://www.ann-geophys.net/20/1499/2002/angeo-20-1499-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1499-2002 0992-7689 1432-0576 https://doaj.org/article/cfb2975a79974242a716214aaa18f8b0 Annales Geophysicae, Vol 20, Pp 1499-1507 (2002) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2002 ftdoajarticles https://doi.org/10.5194/angeo-20-1499-2002 2022-12-31T10:09:00Z 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. Key words. Ionosphere (active experiments; particle acceleration) – Magnetospheric physics (electric fields) Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 20 9 1499 1507 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 S. R. Cash J. A. Davies E. Kolesnikova T. R. Robinson D. M. Wright T. K. Yeoman R. J. Strangeway Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
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. Key words. Ionosphere (active experiments; particle acceleration) – Magnetospheric physics (electric fields) |
format |
Article in Journal/Newspaper |
author |
S. R. Cash J. A. Davies E. Kolesnikova T. R. Robinson D. M. Wright T. K. Yeoman R. J. Strangeway |
author_facet |
S. R. Cash J. A. Davies E. Kolesnikova T. R. Robinson D. M. Wright T. K. Yeoman R. J. Strangeway |
author_sort |
S. R. Cash |
title |
Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
title_short |
Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
title_full |
Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
title_fullStr |
Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
title_full_unstemmed |
Electron acceleration observed by the FAST satellite within the IAR during a 3 Hz modulated EISCAT heater experiment |
title_sort |
electron acceleration observed by the fast satellite within the iar during a 3 hz modulated eiscat heater experiment |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-1499-2002 https://doaj.org/article/cfb2975a79974242a716214aaa18f8b0 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Annales Geophysicae, Vol 20, Pp 1499-1507 (2002) |
op_relation |
https://www.ann-geophys.net/20/1499/2002/angeo-20-1499-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1499-2002 0992-7689 1432-0576 https://doaj.org/article/cfb2975a79974242a716214aaa18f8b0 |
op_doi |
https://doi.org/10.5194/angeo-20-1499-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
9 |
container_start_page |
1499 |
op_container_end_page |
1507 |
_version_ |
1766400100303634432 |