Probe measurements of low plasma densities with applications to the auroral acceleration region and auroral kilometric radiation sources

Details Probe measurements of low plasma densities with applications to the auroral acceleration region and auroral kilometric radiation sources Probe measurements of low plasma densities with applications to the auroral acceleration region and auroral kilometric radiation sources

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8631h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8631-8641. Research supported by CNES.

Physics

51

Atmospheric Physics, Auroral Zones, Density Measurement, Electrostatic Probes, Kilometric Waves, Plasma Density, Electron Density (Concentration), Experiment Design, Night, Photoelectrons

Scientific paper

The response of the Viking Langmuir probe in the auroral acceleration regions at a positively biased potential was investigated using time-series particle data and the Langmuir probe current recorded on orbit 176, and the results of Viking (V 4L) wave analysis for this orbit. A model was developed for investigating the effect of the magnetic field on the collection of the photoelectrons by a probe. Calculations show that the perturbations are negligible when the antenna is perpendicular to the magnetic field, provided that the photoelectron sources are at least 2 Larmor radii from the magnetic field lines connected to the probe. As a consequence, important information can be deduced for the design of experiments conducted at very low density measurements. It is shown that the magnetic field may be a crucial parameter for the study of the exchange of photoelectrons between parts of a satellite.

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