Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations
High-resolution magnetic field data from Cluster Flux Gate Magnetometer (FGM) and the Spatio-Temporal Analysis of Field Fluctuations (STAFF) instruments are used to study turbulent magnetic field fluctuations during the high-altitude cusp crossing on 17 March 2001. Despite the quiet sola...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2006-05-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/24/1057/2006/angeo-24-1057-2006.pdf |
| _version_ | 1811234967337828352 |
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| author | K. Nykyri B. Grison P. J. Cargill B. Lavraud E. Lucek I. Dandouras A. Balogh N. Cornilleau-Wehrlin H. Rème |
| author_facet | K. Nykyri B. Grison P. J. Cargill B. Lavraud E. Lucek I. Dandouras A. Balogh N. Cornilleau-Wehrlin H. Rème |
| author_sort | K. Nykyri |
| collection | DOAJ |
| description | High-resolution magnetic field data from Cluster Flux Gate Magnetometer (FGM)
and the Spatio-Temporal Analysis of Field Fluctuations (STAFF) instruments
are used to study turbulent magnetic field fluctuations during the
high-altitude cusp crossing on 17 March 2001. Despite the quiet solar
wind conditions, the cusp was filled with magnetic field turbulence whose
power correlates with the field-aligned ion plasma flux. The magnetic field
wave spectra shows power law behavior with both double and single slopes with
break in the spectra usually occurring in the vicinity of the local ion
cyclotron frequency. Strong peaks in the wave power close to local ion
cyclotron frequency were sometimes observed, with secondary peaks at higher
harmonics indicative of resonant processes between protons and the waves. We
show that the observed spectral break point may be caused partly by damping
of obliquely propagating kinetic Alfvén (KAW) waves and partly by
cyclotron damping of ion cyclotron waves. |
| first_indexed | 2024-04-12T11:44:15Z |
| format | Article |
| id | doaj.art-ab7482c9d03b4708a5a5c3ddde4fd636 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-12T11:44:15Z |
| publishDate | 2006-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-ab7482c9d03b4708a5a5c3ddde4fd6362022-12-22T03:34:26ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762006-05-01241057107510.5194/angeo-24-1057-2006Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observationsK. Nykyri0B. Grison1P. J. Cargill2B. Lavraud3E. Lucek4I. Dandouras5A. Balogh6N. Cornilleau-Wehrlin7H. Rème8The Blackett Laboratory, Imperial College, London, UKCETP/CNRS-UVSQ, 10/12 Avenue de l Europe, 78140, Velizy, FranceThe Blackett Laboratory, Imperial College, London, UKLos Alamos National Laboratory, Los Alamos, NM, USAThe Blackett Laboratory, Imperial College, London, UKCentre d’Etude Spatiale des Rayonnements,31028 Toulouse Cedex 4, FranceThe Blackett Laboratory, Imperial College, London, UKCETP/CNRS-UVSQ, 10/12 Avenue de l Europe, 78140, Velizy, FranceCentre d’Etude Spatiale des Rayonnements,31028 Toulouse Cedex 4, FranceHigh-resolution magnetic field data from Cluster Flux Gate Magnetometer (FGM) and the Spatio-Temporal Analysis of Field Fluctuations (STAFF) instruments are used to study turbulent magnetic field fluctuations during the high-altitude cusp crossing on 17 March 2001. Despite the quiet solar wind conditions, the cusp was filled with magnetic field turbulence whose power correlates with the field-aligned ion plasma flux. The magnetic field wave spectra shows power law behavior with both double and single slopes with break in the spectra usually occurring in the vicinity of the local ion cyclotron frequency. Strong peaks in the wave power close to local ion cyclotron frequency were sometimes observed, with secondary peaks at higher harmonics indicative of resonant processes between protons and the waves. We show that the observed spectral break point may be caused partly by damping of obliquely propagating kinetic Alfvén (KAW) waves and partly by cyclotron damping of ion cyclotron waves.https://www.ann-geophys.net/24/1057/2006/angeo-24-1057-2006.pdf |
| spellingShingle | K. Nykyri B. Grison P. J. Cargill B. Lavraud E. Lucek I. Dandouras A. Balogh N. Cornilleau-Wehrlin H. Rème Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations Annales Geophysicae |
| title | Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations |
| title_full | Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations |
| title_fullStr | Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations |
| title_full_unstemmed | Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations |
| title_short | Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations |
| title_sort | origin of the turbulent spectra in the high altitude cusp cluster spacecraft observations |
| url | https://www.ann-geophys.net/24/1057/2006/angeo-24-1057-2006.pdf |
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