Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2915m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 2915-2918
Physics
223
Boundary Layers, Broadband, Electrostatic Waves, Geomagnetic Tail, Noise Spectra, Satellite Observation, Solitary Waves, Space Plasmas, Waveforms, Computerized Simulation, Electron Beams, Geophysical Satellites, Mathematical Models, Nonlinearity, Satellite-Borne Instruments, Spectrum Analysis
Scientific paper
Wave forms of BEN (Broadband Electrostatic Noise) in the geomagnetic tail were first detected by the Wave Form Capture reciever on the GEOTAIL spacecraft. The results show that most of the BEN in the plasma sheet boundary layer (PSBL) are not continuous broadband noise but are composed of a series of solitary pulses having a special form which we term 'Electrostatic Solitary Waves (ESW)'. A nonlinear BGK potential model is proposed as the generation mechanism for the ESW based upon a simple particle simulation which considers the highly nonlinear evolution of the electron beam instability. The wave forms produced by this simulation are very similar to those observed by GEOTAIL and suggest that the nonlinear dynamics of the electron beam play an essential role in the generation of ESW.
Kojima Hedeyasu
Matsumoto Haru
Miyatake Tetsuya
Nagano Isamu
Okada Masato
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