Determining the wavelength of Langmuir wave packets at the Earth's bow shock
The propagation of Langmuir waves in plasmas is known to be sensitive to density fluctuations. Such fluctuations may lead to the coexistence of wave pairs that have almost opposite wave-numbers in the vicinity of their reflection points. Using high frequency electric field measurements from the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-03-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/29/613/2011/angeo-29-613-2011.pdf |
| _version_ | 1811274593897283584 |
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| author | V. V. Krasnoselskikh T. Dudok de Wit S. D. Bale |
| author_facet | V. V. Krasnoselskikh T. Dudok de Wit S. D. Bale |
| author_sort | V. V. Krasnoselskikh |
| collection | DOAJ |
| description | The propagation of Langmuir waves in plasmas is known to be sensitive to
density fluctuations. Such fluctuations may lead to the coexistence of wave
pairs that have almost opposite wave-numbers in the vicinity of their
reflection points. Using high frequency electric field measurements from the
WIND satellite, we determine for the first time the wavelength of intense
Langmuir wave packets that are generated upstream of the Earth's electron
foreshock by energetic electron beams. Surprisingly, the wavelength is found
to be 2 to 3 times larger than the value expected from standard theory. These
values are consistent with the presence of strong inhomogeneities in the
solar wind plasma rather than with the effect of weak beam instabilities. |
| first_indexed | 2024-04-12T23:21:54Z |
| format | Article |
| id | doaj.art-c4f67888d3d448278629b288fea273cf |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-12T23:21:54Z |
| publishDate | 2011-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-c4f67888d3d448278629b288fea273cf2022-12-22T03:12:30ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762011-03-012961361710.5194/angeo-29-613-2011Determining the wavelength of Langmuir wave packets at the Earth's bow shockV. V. Krasnoselskikh0T. Dudok de Wit1S. D. Bale2Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, UMR 6115 CNRS and University of Orléans, 3A avenue de la Recherche Scientifique, 45071 Orléans, FranceLaboratoire de Physique et Chimie de l'Environnement et de l'Espace, UMR 6115 CNRS and University of Orléans, 3A avenue de la Recherche Scientifique, 45071 Orléans, FrancePhysics Department and Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USAThe propagation of Langmuir waves in plasmas is known to be sensitive to density fluctuations. Such fluctuations may lead to the coexistence of wave pairs that have almost opposite wave-numbers in the vicinity of their reflection points. Using high frequency electric field measurements from the WIND satellite, we determine for the first time the wavelength of intense Langmuir wave packets that are generated upstream of the Earth's electron foreshock by energetic electron beams. Surprisingly, the wavelength is found to be 2 to 3 times larger than the value expected from standard theory. These values are consistent with the presence of strong inhomogeneities in the solar wind plasma rather than with the effect of weak beam instabilities.https://www.ann-geophys.net/29/613/2011/angeo-29-613-2011.pdf |
| spellingShingle | V. V. Krasnoselskikh T. Dudok de Wit S. D. Bale Determining the wavelength of Langmuir wave packets at the Earth's bow shock Annales Geophysicae |
| title | Determining the wavelength of Langmuir wave packets at the Earth's bow shock |
| title_full | Determining the wavelength of Langmuir wave packets at the Earth's bow shock |
| title_fullStr | Determining the wavelength of Langmuir wave packets at the Earth's bow shock |
| title_full_unstemmed | Determining the wavelength of Langmuir wave packets at the Earth's bow shock |
| title_short | Determining the wavelength of Langmuir wave packets at the Earth's bow shock |
| title_sort | determining the wavelength of langmuir wave packets at the earth s bow shock |
| url | https://www.ann-geophys.net/29/613/2011/angeo-29-613-2011.pdf |
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