Physics – Plasma Physics
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lastr..98..273b&link_type=abstract
L'Astronomie (ISSN 0004-6302), vol. 98, June 1984, p. 273-280. In French.
Physics
Plasma Physics
Auroras, Plasma Physics, Solar Wind, Space Laboratories, Space Plasmas, Spaceborne Experiments, Charged Particles, Chromosphere, Earth Ionosphere, European Space Agency, Plasma-Electromagnetic Interaction, Radio Sources (Astronomy), Spacelab
Scientific paper
The aims and design of the experiment on Phenomena Induced by Charged Particle Beams (PICPAB) flown on the first Spacelab mission are examined, and some preliminary results are reported. The fundamental principles of plasma dynamics, the solar wind, the planetary plasmaspheres, auroral precipitation, and plasma radio emissions are reviewed and illustrated with diagrams. The advantages of active experiments using artificial beams to investigate plasma dynamic responses are explained, and the PICPAB instrumentation is characterized, including the 8-10-keV H(+)/H2(+) and electron accelerators, the antenna arrays and probes, and the microprocessor control unit. The whistler-mode emissions observed in earlier rocket experiments are confirmed, and a strong magnetic component is identified in frequency ranges where a purely electrostatic field is expected. Electron fluxes with energies greater than three times that of the artificial beam are attributed to instability-induced acceleration.
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