Response of the electron energy distribution to an artificially emitted electron beam: APEX experiment

Details Response of the electron energy distribution to an artificially emitted electron beam: APEX experiment Response of the electron energy distribution to an artificially emitted electron beam: APEX experiment

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15r..33p&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 12, p. (12)33-(12)36

Computer Science

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Beam Injection, Beam Interactions, Earth Ionosphere, Electron Beams, Electron Emission, Electron Energy, Energy Distribution, Ionospheric Sounding, Plasma Interactions, Active Satellites, Computerized Simulation, Electron Guns, Electrostatics, Energy Spectra, Mathematical Models, Satellite Sounding, Spacecraft Charging

Scientific paper

The paper is based on the electron and ion energy spectra measurement on board the main spacecraft of the Advance Photovoltaic Electronic Experiment (APEX) mission. During the active phase of the experiment an intense elecron beam was emitted from the main satellite. The basic cycle of the electron injection is formed by current pulses of different frequencies, duration and intensity. The spacecraft potential changes due to the gun operation were compensated by a low energy Xe plasma generator. The data show that the response of the environment to the beam emission depends not only on injection parameters but on the spacecraft position and orientation with respect to the magnetic field as well. The typical response is an increase of the intensity of the low energy (less than 1 keV) electrons in all directions. In addition, strong field aligned fluxes of electrons and/or ions are observed with energies below the gun energy. An attempt to classify different types of response and to find possible mechanisms which can explain the observed phenomena is made in the present paper.

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