ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter
Available from the publisher website at http://www.ann-geophys.net/19/159/2001/angeo-19-159-2001.html HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecede...
Published in: | Annales Geophysicae |
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Language: | English |
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Online Access: | http://hdl.handle.net/2381/718 http://www.ann-geophys.net/19/159/2001/ https://doi.org/10.5194/angeo-19-159-2001 |
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ftleicester:oai:lra.le.ac.uk:2381/718 2023-05-15T16:04:43+02:00 ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter Yeoman, Tim K. Wright, D. M. 2009-12-08T16:24:10Z http://hdl.handle.net/2381/718 http://www.ann-geophys.net/19/159/2001/ https://doi.org/10.5194/angeo-19-159-2001 en eng RAE 2007 Radio and Space Plasma Physics Annales Geophysicae: Atmospheres Hydrospheres and Space Science, 2001, 19 (2), pp.159-170 0992-7689 http://hdl.handle.net/2381/718 http://www.ann-geophys.net/19/159/2001/ doi:10.5194/angeo-19-159-2001 © Author(s) 2001. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY Article 2009 ftleicester https://doi.org/10.5194/angeo-19-159-2001 2019-03-22T20:13:54Z Available from the publisher website at http://www.ann-geophys.net/19/159/2001/angeo-19-159-2001.html HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by the CUTLASS HF radars. Within a short period of time during a single four hour experiment three distinct wave types are observed with differing periods, and latitudinal and longitudinal phase evolution. Combining information from the three waves allows them to be divided into those with a large-scale nature, driven externally to the magnetosphere, and those with small azimuthal scale lengths, driven by wave-particle interactions. Furthermore, the nature of the wave-particle interactions for two distinct small-scale waves is revealed, with one wave interpreted as being driven by a drift resonance process and the other by a drift-bounce resonance interaction. Both of these mechanisms with m ≈ -35 and proton energies of 35–45 keV appear to be viable wave energy sources in the postnoon sector. Article in Journal/Newspaper EISCAT Tromsø University of Leicester: Leicester Research Archive (LRA) Tromsø Annales Geophysicae 19 2 159 170 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
description |
Available from the publisher website at http://www.ann-geophys.net/19/159/2001/angeo-19-159-2001.html HF radar backscatter which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø has been demonstrated to provide ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by the CUTLASS HF radars. Within a short period of time during a single four hour experiment three distinct wave types are observed with differing periods, and latitudinal and longitudinal phase evolution. Combining information from the three waves allows them to be divided into those with a large-scale nature, driven externally to the magnetosphere, and those with small azimuthal scale lengths, driven by wave-particle interactions. Furthermore, the nature of the wave-particle interactions for two distinct small-scale waves is revealed, with one wave interpreted as being driven by a drift resonance process and the other by a drift-bounce resonance interaction. Both of these mechanisms with m ≈ -35 and proton energies of 35–45 keV appear to be viable wave energy sources in the postnoon sector. |
format |
Article in Journal/Newspaper |
author |
Yeoman, Tim K. Wright, D. M. |
spellingShingle |
Yeoman, Tim K. Wright, D. M. ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
author_facet |
Yeoman, Tim K. Wright, D. M. |
author_sort |
Yeoman, Tim K. |
title |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_short |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_full |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_fullStr |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_full_unstemmed |
ULF waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced HF radar backscatter |
title_sort |
ulf waves with drift resonance and drift-bounce resonance energy sources as observed in artificially-induced hf radar backscatter |
publishDate |
2009 |
url |
http://hdl.handle.net/2381/718 http://www.ann-geophys.net/19/159/2001/ https://doi.org/10.5194/angeo-19-159-2001 |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_relation |
RAE 2007 Radio and Space Plasma Physics Annales Geophysicae: Atmospheres Hydrospheres and Space Science, 2001, 19 (2), pp.159-170 0992-7689 http://hdl.handle.net/2381/718 http://www.ann-geophys.net/19/159/2001/ doi:10.5194/angeo-19-159-2001 |
op_rights |
© Author(s) 2001. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/angeo-19-159-2001 |
container_title |
Annales Geophysicae |
container_volume |
19 |
container_issue |
2 |
container_start_page |
159 |
op_container_end_page |
170 |
_version_ |
1766400349773496320 |