Nature 287, 15 - 17 (04 September 1980); doi:10.1038/287015a0

Bunching of 8−10 keV auroral electrons near an artificial electron beam

M. P. Gough^*, B. N. Maehlum^†, G. Martelli^*, P. N. Smith^* & G. Ventura^‡

^*School of Mathematical and Physical Sciences, University of Sussex, Brighton BN1 9QH, UK
^†Norwegian Defence Research Establishment, Kjeller, Norway
^‡University of Florence, Florence, Italy

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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