Abstract
The critical ionization velocity effect was first proposed in the context of space plasmas. This effect occurs for a neutral gas moving through a magnetized plasma and leads to rapid ionization and braking of the relative motion when a marginal velocity, “the critical velocity”, is exceeded. Laboratory experiments have clearly established the significance of the critical velocity and have provided evidence for an underlying mechanism which relies on the combined action of electron impact ionization and a collective plasma interaction heating electrons. There is experimental support for such a mechanism based on the heating of electrons by the modified two-stream instability as part of a feedback process. Several applications to space plasmas have been proposed and the possibility of space experiments has been discussed.
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Raadu, M.A. (1981). The Critical Ionization Velocity. In: Kikuchi, H. (eds) Relation Between Laboratory and Space Plasmas. Astrophysics and Space Science Library, vol 84. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8440-0_2
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DOI: https://doi.org/10.1007/978-94-009-8440-0_2
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