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Original title:
Dependence of the Sweep Rate of Whistler-mode Chorus Emissions on the Plasma Density
Authors: Macúšová, Eva ; Santolík, Ondřej ; Gurnett, D. A. ; Pickett, J. S. ; Nunn, D. ; Trakhtengerts, V. Y. ; Demekhov, A. G. ; Titova, E. E. ; Kozelov, V. ; Rycroft, M. J.
Document type: Papers
Conference/Event: Week of Doctoral Students 2007, Praha (CZ), 2007-06-05 / 2007-06-08
Year: 2007
Language: eng
Abstract: Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is localised close to the geomagnetic equatorial plane. Our investigation is based on multipoint measurements of the wideband (WBD) plasma wave instruments on board the four Cluster spacecraft. We investigate the sweep rate of the chorus frequency as a Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is localised close to the geomagnetic equatorial plane. Our investigation is based on multipoint measurements of the wideband (WBD) plasma wave instruments on board the four Cluster spacecraft. We investigate the sweep rate of the chorus frequency as a function of the cold plasma density in the equatorial plane and then we compare it A theoretical model, numerical simulations and also our preliminary results from the measurements predict an increasing sweep rate with decreasing cold plasma density.
Keywords: Chorus Emissions
Project no.: CEZ:AV0Z30420517 (CEP), GA205/03/0953 (CEP), PECS No. 98025
Funding provider: GA ČR, ESA
Host item entry: WDS’07 Proceedings of contributed paper, Part II - Physics of Plasmas and Ionized Media, ISBN 978-80-7378-024-1
Note: Související webová stránka: http://www.mff.cuni.cz/veda/konference/wds/proc/proc-contents.php?year=2007
Institution: Institute of Atmospheric Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0224395
Permalink: http://www.nusl.cz/ntk/nusl-156616
The record appears in these collections:
Research > Institutes ASCR > Institute of Atmospheric Physics
Conference materials > Papers
Authors: Macúšová, Eva ; Santolík, Ondřej ; Gurnett, D. A. ; Pickett, J. S. ; Nunn, D. ; Trakhtengerts, V. Y. ; Demekhov, A. G. ; Titova, E. E. ; Kozelov, V. ; Rycroft, M. J.
Document type: Papers
Conference/Event: Week of Doctoral Students 2007, Praha (CZ), 2007-06-05 / 2007-06-08
Year: 2007
Language: eng
Abstract: Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is localised close to the geomagnetic equatorial plane. Our investigation is based on multipoint measurements of the wideband (WBD) plasma wave instruments on board the four Cluster spacecraft. We investigate the sweep rate of the chorus frequency as a Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is localised close to the geomagnetic equatorial plane. Our investigation is based on multipoint measurements of the wideband (WBD) plasma wave instruments on board the four Cluster spacecraft. We investigate the sweep rate of the chorus frequency as a function of the cold plasma density in the equatorial plane and then we compare it A theoretical model, numerical simulations and also our preliminary results from the measurements predict an increasing sweep rate with decreasing cold plasma density.
Keywords: Chorus Emissions
Project no.: CEZ:AV0Z30420517 (CEP), GA205/03/0953 (CEP), PECS No. 98025
Funding provider: GA ČR, ESA
Host item entry: WDS’07 Proceedings of contributed paper, Part II - Physics of Plasmas and Ionized Media, ISBN 978-80-7378-024-1
Note: Související webová stránka: http://www.mff.cuni.cz/veda/konference/wds/proc/proc-contents.php?year=2007
Institution: Institute of Atmospheric Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0224395
Permalink: http://www.nusl.cz/ntk/nusl-156616
The record appears in these collections:
Research > Institutes ASCR > Institute of Atmospheric Physics
Conference materials > Papers
Record created 2013-10-04, last modified 2021-11-24