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Ducted propagation of chorus waves: Cluster observations
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2011 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 29, no 9, 1629-1634 p.Article in journal (Refereed) Published
Abstract [en]

Ducted propagation of whistler waves in the terrestrial magnetosphere-ionosphere system was discussed and studied long before the first in-situ spacecraft measurements. While a number of implicit examples of the existence of ducted propagation have been found, direct observation of ducts has been hampered by the low sampling rates of measurements of the plasma density. The present paper is based on Cluster observations of chorus waves. The ability to use measurements of the spacecraft potential as a proxy for high time resolution electron density measurements is exploited to identify a number of cases when increased chorus wave power, observed within the radiation belts, is observed simultaneously with density enchantments. It is argued that the observation of ducted propagation of chorus implies modification of numerical models for plasma-wave interactions within the radiation belts.

Place, publisher, year, edition, pages
2011. Vol. 29, no 9, 1629-1634 p.
Keyword [en]
Electromagnetics, Guided waves, Wave propagation, Magnetospheric physics, Plasma waves and instabilities
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URN: urn:nbn:se:uu:diva-160530DOI: 10.5194/angeo-29-1629-2011ISI: 000295399100010OAI: oai:DiVA.org:uu-160530DiVA: diva2:451229
Available from: 2011-10-25 Created: 2011-10-25 Last updated: 2011-10-25Bibliographically approved

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Swedish Institute of Space Physics, Uppsala Division
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