Interpretation of the electric fields measured in an ionospheric critical ionization velocity experiment

Details Interpretation of the electric fields measured in an ionospheric critical ionization velocity experiment Interpretation of the electric fields measured in an ionospheric critical ionization velocity experiment

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9719b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 1, 1991, p. 9719-9733. Research supported by Swedish National Sp

Physics

21

Artificial Clouds, Earth Ionosphere, Electric Fields, Ionization, Plasma-Electromagnetic Interaction, Field Aligned Currents, Geoelectricity, Magnetic Field Configurations

Scientific paper

The quasi-dc electric fields measured in the CRIT I ionospheric release experiment are studied. In the experiment, two identical barium shaped charges were fired toward a main payload, and three-dimensional measurements of the electric field inside the streams were made. The relevance of proposed mechanisms for electron heating in the critical ionization velocity (CIV) mechanism is addressed. It is concluded that both the 'homogeneous' and the 'ionizing front' models probably are valid, but in different parts of the streams. It is also possible that electrons are directly accelerated by a magnetic field-aligned component of the electric field. The coupling between the ambient ionosphere and the ionized barium stream is more complicated that is usually assumed in CIV theories, with strong magnetic-field-aligned electric fields and probably current limitation as important processes.

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