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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 30, issue 7
Ann. Geophys., 30, 1093–1097, 2012
https://doi.org/10.5194/angeo-30-1093-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 30, 1093–1097, 2012
https://doi.org/10.5194/angeo-30-1093-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 25 Jul 2012

Regular paper | 25 Jul 2012

Auroral kilometric radiation from a nonstationary thin plasma cavity

T. M. Burinskaya1 and J.-L. Rauch2 T. M. Burinskaya and J.-L. Rauch
  • 1Space Research Institute of RAS, Profsoyuznaya str. 84/32, Moscow, 117997, Russia
  • 2Laboratoire de Physique et Chimie de L'Environnement et de L'Espace, UMR6115 CNRS – Université d'Orléans, 3A Avenue de la Recherche Scientifique, France

Abstract. Results obtained using a waveguide model of the AKR generation in thin plasma cavities are presented. Taking into account the occurrence of low frequency plasma motion in the regions of the AKR generation, we have considered a wave escape from a thin plasma cavity with adiabatically slowly varying width, and show that there can exist localized regions of instability from which the extraordinary X-mode waves, growing in time, can be radiated outwards. It has been found that waves, propagating quasi-tangentially to the source frontiers, have the maximum growth rate and escape outward most efficiently, which is in accordance with experimental observations.

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