Determining the wavelength of Langmuir wave packets at the Earth's bow shock - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Annales Geophysicae Année : 2011

Determining the wavelength of Langmuir wave packets at the Earth's bow shock

Résumé

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.
Fichier principal
Vignette du fichier
angeo-29-613-2011.pdf (1.46 Mo) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

insu-01180097 , version 1 (24-07-2015)

Identifiants

Citer

V.V. Krasnoselskikh, Thierry Dudok de Wit, S.D. Bale. Determining the wavelength of Langmuir wave packets at the Earth's bow shock. Annales Geophysicae, 2011, 29, pp.613-617. ⟨10.5194/angeo-29-613-2011⟩. ⟨insu-01180097⟩
34 Consultations
89 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More