Physics
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.5217h&link_type=abstract
Journal of Geophysical Research, vol. 83, Nov. 1, 1978, p. 5217-5226. NASA-Navy-supported research.
Physics
54
Electrostatic Waves, Geomagnetic Tail, Magnetohydrodynamic Stability, Magnetohydrodynamic Waves, Plasma Turbulence, Satellite Observation, Fireballs, Polarization Characteristics, Propagation Modes, Spectrum Analysis, Transport Properties
Scientific paper
Recent satellite observations of electrostatic and magnetic noise in the distant magnetotail (Gurnett et al., 1976) can be explained by the excitation of the lower-hybrid-drift instability. In particular, it is shown that (1) existence conditions for the lower-hybrid-drift instability can be met, (2) the observed frequency spectra and polarization are in good agreement with the predictions of linear theory, and (3) the observed amplitudes of fluctuations are consistent with the nonlinear theory of this mode. Moreover, the observation of this instability suggests that the anomalous transport properties associated with these waves, which are important in many laboratory devices, may play a crucial role in the macroscopic evolution of magnetotail processes such as field line merging, tearing instabilities, or 'fireballs'.
Gladd N. T.
Huba Joseph D.
Papadopoulos Konstantinos
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