Artificial stimulation of auroral electron acceleration by intense field aligned currents

Details Artificial stimulation of auroral electron acceleration by intense field aligned currents Artificial stimulation of auroral electron acceleration by intense field aligned currents

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..789h&link_type=abstract

Geophysical Research Letters, vol. 6, Oct. 1979, p. 789, 790. Research supported by the Swedish Board for Space Activities, NASA

Computer Science

Sound

Artificial Clouds, Auroral Zones, Electron Precipitation, Field Aligned Currents, Ionospheric Propagation, Particle Acceleration, Electric Current, Electron Accelerators, Explosions, Rocket Sounding, Time Response

Scientific paper

A cesium-doped high explosion was detonated at 165 km altitude in the auroral ionosphere during quiet conditions. An Alfven wave pulse with a 200-mV/m electric field was observed, with the peak occurring 135 ms after the explosion at a distance of about 1 km. The count rate of fixed energy 2-keV electron detectors abruptly increased at 140 ms, peaked at 415 ms, and indicated a downward field-aligned beam of accelerated electrons. An anomalously high-field aligned beam of backscattered electrons was also detected. The acceleration is interpreted as due to production of an electrostatic shock or double layer between 300 and 800 km altitude. The structure was probably formed by an instability of the intense field-aligned currents in the Alfven wave launched by the charge-separation electric field due to the explosion.

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