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- W2083448237 abstract "A two-dimensional, isolated-system electrostatic simulation model is used to investigate the plasma environment in the vicinity of a spacecraft during the injection of dense electron beams. The nature of the injection process is determined primarily by the relative value of two characteristic time scales: the beam stagnation time ts and the plasma response time trp. When ts<trp, spacecraft charging is significant and most of the beam electrons are drawn back into the spacecraft. When ts>trp, vehicle charging is reduced and the beam propagates away from the source. In this latter case there is strong beam-plasma turbulence which destroys the coherence of the beam within one or two gyroperiods. The spatial distribution of the beam has the form of a hollow cylinder near the source. As the beam propagates away from the source, the cylinder becomes increasingly filled. Return currents are associated with the field-aligned flow of ambient electrons, while current closure is provided primarily by the cross-field motion of the ions. Energization of the ambient electrons may increase the apparent beam size as determined from low-light TV images." @default.
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- W2083448237 date "1988-01-01" @default.
- W2083448237 modified "2023-09-27" @default.
- W2083448237 title "Beam-plasma interactions in space experiments. A simulation study." @default.
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- W2083448237 doi "https://doi.org/10.5636/jgg.40.1235" @default.
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