Derivation of electron densities from differential potential measurements upstream and downstream of the bow shock and in the magnetosphere of Mars

Details Derivation of electron densities from differential potential measurements upstream and downstream of the bow shock and in the magnetosphere of Mars Derivation of electron densities from differential potential measurements upstream and downstream of the bow shock and in the magnetosphere of Mars

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9611243p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, July 1, 1991, p. 11,243-11,252.

Physics

25

Electron Density Profiles, Mars (Planet), Planetary Magnetospheres, Electric Potential, Phobos, Solar Wind, Space Plasmas

Scientific paper

A new technique is developed where the potential difference between a conductive spacecraft at floating potential and an electric field probe, negatively biased in relation to the spacecraft, with a current of 50 nA, is used to determine electron densities in the range 1-70/cu cm. This technique has been applied to the Phobos 2 spacecraft data to determine characteristic densities in the solar wind near Mars, in the foot of the bow shock, in the planetosheath, and at the top of the ionosphere. A magnetic barrier, with a low plasma density, is observed between the planetosheath and the top of the ionosphere. Pronounced electron density increases are observed on the flanks and in the tail, some correlated and some anticorrelated with variations in the magnetic field strength.

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