Abstract
High frequency modulations (∼1 MHz) of energetic (keV) electrons in the auroral ionosphere have been detected unambiguously for the first time using a novel technique. These modulations were induced by an artificially injected pulsed electron beam (8 keV, 4% duty cycle), and were accompanied by electrostatic wave emissions at the same frequency.
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Gough, M., Maehlum, B., Martelli, G. et al. Bunching of 8–10 keV auroral electrons near an artificial electron beam. Nature 287, 15–17 (1980). https://doi.org/10.1038/287015a0
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DOI: https://doi.org/10.1038/287015a0
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