A simple model for the inital phase of a water plasma cloud about a large structure in space

Details A simple model for the inital phase of a water plasma cloud about a large structure in space A simple model for the inital phase of a water plasma cloud about a large structure in space

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.1961h&link_type=abstract

Journal of Geophysical Research, Volume 93, Issue A3, p. 1961-1973

Physics

Plasma Physics

12

Space Plasma Physics: Active Perturbation Experiments, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Transport Processes

Scientific paper

Large structures in the ionosphere will outgas or eject neutral water and perturb the ambient neutral environment. This water can undergo charge exchange with the ambient oxygen ions and form a water plasma cloud. Additionally, water dumps or thruster firings can create a water plasma cloud. A simple model for the evolution of a water plasma cloud about a large space structure is obtained. It is shown that if the electron density around a large space structure is substantially enhanced above the ambient density then the plasma cloud will move away from the structure. As the cloud moves away, it will become unstable and will eventually break up into filaments. A true steady state will exist only if the total electron density is unperturbed from the ambient density. When the water density is taken to be consistent with shuttle-based observations, the cloud is found to slowly drift away on a time scale of many tens of milliseconds. This time is consistent with the shuttle observations.

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