Cavitating Langmuir Turbulence in the Terrestrial Aurora
| Autor: | Isham, B., Rietveld, M. T., Guio, P., Forme, F. R. E., Grydeland, T., Mjølhus, E. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett., 10 (2012), 108, 105003 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.108.105003 |
| Popis: | Langmuir cavitons have been artificially produced in the earth's ionosphere, but evidence of naturally-occurring cavitation has been elusive. By measuring and modeling the spectra of electrostatic plasma modes, we show that natural cavitating, or strong, Langmuir turbulence does occur in the ionosphere, via a process in which a beam of auroral electrons drives Langmuir waves, which in turn produce cascading Langmuir and ion-acoustic excitations and cavitating Langmuir turbulence. The data presented here are the first direct evidence of cavitating Langmuir turbulence occurring naturally in any space or astrophysical plasma. Comment: 4 pages, 4 figures, published in PRL on 9 March 2012 http://link.aps.org/doi/10.1103/PhysRevLett.108.105003 |
| Databáze: | arXiv |
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