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| Titel |
Geometric aspects of HF driven Langmuir turbulence in the ionosphere |
| VerfasserIn |
E. Mjølhus, E. Helmersen, D. F. Dubois |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 10, no. 1/2 ; Nr. 10, no. 1/2, S.151-177 |
| Datensatznummer |
250007830
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| Publikation (Nr.) |
 copernicus.org/npg-10-151-2003.pdf |
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| Zusammenfassung |
| The geometric
aspects of HF-generated Langmuir turbulence in the ionosphere and its
detection by radars are theoretically discussed in a broad approach,
including local modelling (damped and driven Zakharov system), basic
parametric instabilities, polarization and strength of the driving
electric field, and radar configurations. Selected examples of numerical
results from the local model are presented and discussed in relation to
recent experiments, with emphasis on recent experiments at the EISCAT
facilities. Anisotropic aspects of the cavitation process in the
magnetized plasma are exhibited. Basic processes of cascades and
cavitation are by now well identified in these experiments, but a few
problems of the detailed agreement between theory and experiments are
pointed out. |
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