Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.5140m&link_type=abstract
Journal of Geophysical Research, vol. 87, July 1, 1982, p. 5140-5150. Research supported by the Australian Research Grants Comm
Physics
122
Auroral Zones, Cyclotron Radiation, Electron Precipitation, Kilometric Waves, Terrestrial Radiation, Flux Quantization, Kinematics, Rates (Per Time), Resonance
Scientific paper
It is shown that electrons in inverted V events can cause direct, amplified cyclotron emission (x-mode radiation) above the cutoff frequency, and the growth rate of the waves is calculated by using inverted V electron event observations as the inputs of a numerical code. Calculation results exhibiting wave growth are adduced as evidence for the cyclotron interpretation of terrestrial kilometric radiation (TKR). It is speculated that the specific electron distribution features which generate TKR should disappear in much less than a second, and should therefore not be observable in particle data averaged over more than one second. The basic electron distribution feature that gives rise to TKR is a one-sided loss cone anisotropy in which upward moving electrons with small pitch angles are missing. The features causing large growth rates may be due to the effects of the parallel electric field.
Hewitt R. G.
Melrose Donald B.
Ronnmark Kjell G.
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