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Cluster observations of trapped ions interacting with magnetosheath mirror modes
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SYSNO ASEP 0360932 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cluster observations of trapped ions interacting with magnetosheath mirror modes Author(s) Souček, Jan (UFA-U) RID, ORCID
Escoubet, C. P. (NL)Source Title Annales Geophysicae. - : Copernicus - ISSN 0992-7689
Roč. 29, - (2011), s. 1049-1060Number of pages 12 s. Language eng - English Country DE - Germany Keywords mirror mode waves ; trapped particles ; magnetosheath ions Subject RIV BL - Plasma and Gas Discharge Physics CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000291945800009 DOI 10.5194/angeo-29-1049-2011 Annotation Mirror modes are among the most intense low frequency plasma wave phenomena observed in the magnetosheaths of magnetized planets. They appear as large amplitude non-propagating fluctuations in the magnetic field magnitude and plasma density. These structures are widely accepted to represent a non-linear stage of the mirror instability, dominant in plasmas with large ion beta and a significant ion temperature anisotropy. It has long been recognized that the mirror instability both in the linear and non-linear stage is a kinetic process and that the behavior of resonant particles at small parallel velocities is crucial for its development and saturation. In this work we used data from the Cluster spacecraft to perform the first detailed experimental study of ion velocity distribution associated with mirror mode oscillations. We show a conclusive evidence for the predicted cooling of resonant ions at small parallel velocities and heating of trapped ions at intermediate pitch angles. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2012 Electronic address http://www.ann-geophys.net/29/1049/2011/angeo-29-1049-2011.pdf
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