Physics – Plasma Physics
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10211399m&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue A6, p. 11399-11408
Physics
Plasma Physics
21
Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
We describe wave observations carried out on board Galileo during the crossing of a flux rope in the Earth magnetotail. Waveform observations give evidence for transient electrostatic structures. Numerical simulations of the evolution of counterstreaming electron beams with a core of hotter ions have been performed with parameters consistent with Galileo observations during the flux rope crossing. A strongly unstable mode, with a zero real part of the frequency is found to develop and to lead to the generation of coherent electrostatic structures with velocities between +/-vt, the electron thermal velocity. The characteristics of the simulated structures are shown to be similar to those observed in the magnetotail.
Louarn Ph.
Mottez Fabrice
Perraut Sylvaine
Roux Alain
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