Some results from the auroral particle experiment on board the Barium-GEOS rocket

Details Some results from the auroral particle experiment on board the Barium-GEOS rocket Some results from the auroral particle experiment on board the Barium-GEOS rocket

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980esasp.152..263e&link_type=abstract

In ESA European Rocket and Balloon Programs and Related Res. p 263-268 (SEE N81-10914 01-99)

Computer Science

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Auroras, Barium Ion Clouds, Electronic Spectra, Magnetospheric Electron Density, Magnetospheric Ion Density, Sounding Rockets, Electron Energy, Electron Flux Density, Magnetic Fields, Particle Acceleration

Scientific paper

The Barium GEOS rocket was launched from Esrange on September 24, 1979 during the expansion phase of a magnetic substorm. Electron and positive ion measurements were performed with detectors looking in different directions relative the rocket spin axis with high angular resolution in the energy range 70 eV - 21 KeV. Peaked electron energy spectra were observed during most of the flight. Highly collimated electron fluxes (within 10 degrees) were often seen at the energy level just below the peak energy. Most of the observed features of the electron distribution are found to be consistent with an acceleration mechanism including a parallel potential difference. The mechanism including a parallel potential difference. The characteristic energy is found to increase and the number density to decrease as the accelerating voltage increases. This is in good agreement with a theory predicting that the potential drop is built up as a consequence of a magnetospheric dynamo requiring a current of a certain magnitude to flow along the magnetic field lines.

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