Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems

Publication Date:
2018-03-06
Publisher:
Wiley-Blackwell
Print ISSN:
0094-8276
Electronic ISSN:
1944-8007
Topics:
Geosciences
Physics
Published by:
http://www.wiley.com/wiley-blackwell
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autor O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
beschreibung Whistler-mode chorus waves are particularly important in outer radiation belt dynamics due to their key role in controlling the acceleration and scattering of electrons over a very wide energy range. The efficiency of wave-particle resonant interactions is defined by whistler wave properties which have been described by the approximation of plane linear waves propagating through the cold plasma of the inner magnetosphere. However, recent observations of extremely high amplitude whistlers suggest the importance of nonlinear wave-particle interactions for the dynamics of the outer radiation belt. Oblique chorus waves observed in the inner magnetosphere often exhibit drastically non-sinusoidal (with significant power in the higher harmonics) waveforms of the parallel electric field, presumably due to the feedback from hot resonant electrons. We have considered the nature and properties of such nonlinear whistler waves observed by the Van Allen Probes and THEMIS in the inner magnetosphere and we show that the significant enhancement of the wave electrostatic component can result from whistler wave coupling with the beam-driven electrostatic mode through the resonant interaction with hot electron beams. Being modulated by a whistler wave, the electron beam generates a driven electrostatic mode significantly enhancing the parallel electric field of the initial whistler wave. We confirm this mechanism using a self-consistent particle-in-cell simulation. The nonlinear electrostatic component manifests properties of the beam-driven electron acoustic mode and can be responsible for effective electron acceleration in the inhomogeneous magnetic field.
citation_standardnr 6186270
datenlieferant ipn_articles
feed_copyright American Geophysical Union (AGU)
feed_copyright_url http://www.agu.org/
feed_id 4905
feed_publisher Wiley-Blackwell
feed_publisher_url http://www.wiley.com/wiley-blackwell
insertion_date 2018-03-06
journaleissn 1944-8007
journalissn 0094-8276
publikationsjahr_anzeige 2018
publikationsjahr_facette 2018
publikationsjahr_intervall 7984:2015-2019
publikationsjahr_sort 2018
publisher Wiley-Blackwell
quelle Geophysical Research Letters
relation http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1002%2F2017GL076957
search_space articles
shingle_author_1 O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
shingle_author_2 O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
shingle_author_3 O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
shingle_author_4 O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
shingle_catch_all_1 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
Whistler-mode chorus waves are particularly important in outer radiation belt dynamics due to their key role in controlling the acceleration and scattering of electrons over a very wide energy range. The efficiency of wave-particle resonant interactions is defined by whistler wave properties which have been described by the approximation of plane linear waves propagating through the cold plasma of the inner magnetosphere. However, recent observations of extremely high amplitude whistlers suggest the importance of nonlinear wave-particle interactions for the dynamics of the outer radiation belt. Oblique chorus waves observed in the inner magnetosphere often exhibit drastically non-sinusoidal (with significant power in the higher harmonics) waveforms of the parallel electric field, presumably due to the feedback from hot resonant electrons. We have considered the nature and properties of such nonlinear whistler waves observed by the Van Allen Probes and THEMIS in the inner magnetosphere and we show that the significant enhancement of the wave electrostatic component can result from whistler wave coupling with the beam-driven electrostatic mode through the resonant interaction with hot electron beams. Being modulated by a whistler wave, the electron beam generates a driven electrostatic mode significantly enhancing the parallel electric field of the initial whistler wave. We confirm this mechanism using a self-consistent particle-in-cell simulation. The nonlinear electrostatic component manifests properties of the beam-driven electron acoustic mode and can be responsible for effective electron acceleration in the inhomogeneous magnetic field.
O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
Wiley-Blackwell
0094-8276
00948276
1944-8007
19448007
shingle_catch_all_2 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
Whistler-mode chorus waves are particularly important in outer radiation belt dynamics due to their key role in controlling the acceleration and scattering of electrons over a very wide energy range. The efficiency of wave-particle resonant interactions is defined by whistler wave properties which have been described by the approximation of plane linear waves propagating through the cold plasma of the inner magnetosphere. However, recent observations of extremely high amplitude whistlers suggest the importance of nonlinear wave-particle interactions for the dynamics of the outer radiation belt. Oblique chorus waves observed in the inner magnetosphere often exhibit drastically non-sinusoidal (with significant power in the higher harmonics) waveforms of the parallel electric field, presumably due to the feedback from hot resonant electrons. We have considered the nature and properties of such nonlinear whistler waves observed by the Van Allen Probes and THEMIS in the inner magnetosphere and we show that the significant enhancement of the wave electrostatic component can result from whistler wave coupling with the beam-driven electrostatic mode through the resonant interaction with hot electron beams. Being modulated by a whistler wave, the electron beam generates a driven electrostatic mode significantly enhancing the parallel electric field of the initial whistler wave. We confirm this mechanism using a self-consistent particle-in-cell simulation. The nonlinear electrostatic component manifests properties of the beam-driven electron acoustic mode and can be responsible for effective electron acceleration in the inhomogeneous magnetic field.
O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
Wiley-Blackwell
0094-8276
00948276
1944-8007
19448007
shingle_catch_all_3 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
Whistler-mode chorus waves are particularly important in outer radiation belt dynamics due to their key role in controlling the acceleration and scattering of electrons over a very wide energy range. The efficiency of wave-particle resonant interactions is defined by whistler wave properties which have been described by the approximation of plane linear waves propagating through the cold plasma of the inner magnetosphere. However, recent observations of extremely high amplitude whistlers suggest the importance of nonlinear wave-particle interactions for the dynamics of the outer radiation belt. Oblique chorus waves observed in the inner magnetosphere often exhibit drastically non-sinusoidal (with significant power in the higher harmonics) waveforms of the parallel electric field, presumably due to the feedback from hot resonant electrons. We have considered the nature and properties of such nonlinear whistler waves observed by the Van Allen Probes and THEMIS in the inner magnetosphere and we show that the significant enhancement of the wave electrostatic component can result from whistler wave coupling with the beam-driven electrostatic mode through the resonant interaction with hot electron beams. Being modulated by a whistler wave, the electron beam generates a driven electrostatic mode significantly enhancing the parallel electric field of the initial whistler wave. We confirm this mechanism using a self-consistent particle-in-cell simulation. The nonlinear electrostatic component manifests properties of the beam-driven electron acoustic mode and can be responsible for effective electron acceleration in the inhomogeneous magnetic field.
O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
Wiley-Blackwell
0094-8276
00948276
1944-8007
19448007
shingle_catch_all_4 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
Whistler-mode chorus waves are particularly important in outer radiation belt dynamics due to their key role in controlling the acceleration and scattering of electrons over a very wide energy range. The efficiency of wave-particle resonant interactions is defined by whistler wave properties which have been described by the approximation of plane linear waves propagating through the cold plasma of the inner magnetosphere. However, recent observations of extremely high amplitude whistlers suggest the importance of nonlinear wave-particle interactions for the dynamics of the outer radiation belt. Oblique chorus waves observed in the inner magnetosphere often exhibit drastically non-sinusoidal (with significant power in the higher harmonics) waveforms of the parallel electric field, presumably due to the feedback from hot resonant electrons. We have considered the nature and properties of such nonlinear whistler waves observed by the Van Allen Probes and THEMIS in the inner magnetosphere and we show that the significant enhancement of the wave electrostatic component can result from whistler wave coupling with the beam-driven electrostatic mode through the resonant interaction with hot electron beams. Being modulated by a whistler wave, the electron beam generates a driven electrostatic mode significantly enhancing the parallel electric field of the initial whistler wave. We confirm this mechanism using a self-consistent particle-in-cell simulation. The nonlinear electrostatic component manifests properties of the beam-driven electron acoustic mode and can be responsible for effective electron acceleration in the inhomogeneous magnetic field.
O. Agapitov, J. F. Drake, I. Vasko, F. S. Mozer, A. Artemyev, V. Krasnoselskikh, V. Angelopoulos, J. Wygant, G. D. Reeves
Wiley-Blackwell
0094-8276
00948276
1944-8007
19448007
shingle_title_1 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
shingle_title_2 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
shingle_title_3 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
shingle_title_4 Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
timestamp 2025-06-30T23:33:10.395Z
titel Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
titel_suche Nonlinear electrostatic steepening of whistler waves: the guiding factors and dynamics in inhomogeneous systems
topic TE-TZ
U
uid ipn_articles_6186270