Berlin 2005 – scientific programme
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EP: Extraterrestrische Physik
EP 1: Magnetosph
äre und Ionosph
äre
EP 1.4: Talk
Friday, March 4, 2005, 10:45–11:00, TU BH349
Cluster observations of almost monochromatic whistler wave packets and the mechanism of their formation — •Eduard Dubinin1, K. Sauer2, M. Maksimovic1, N. Cornilleau-Werhlin3, A. Balogh4, and D. Fontaine3 — 1MPS, Katlenburg-Lindau, Germany — 2DESPA, Observatoire de Paris, France — 3CETP/UVSQ, Velizy, France — 4Imperial College, London, UK
The STAFF-SC measurements on Cluster show that whistler turbulence observed in the distant magnetosphere often consists of almost monochromatic wave packets at frequency of few tenth of electron gyrofrequency. Analysis of mechanism of their formation based on the assumption that these nonlinear coherent structures are oscillatory waves (kind of solitary waves) generated by electron anisotropy or loss-cone distribution is made. It is shown that the main wave characteristics can be understood in the terms of this mechanism.