The motion of contaminant water plasma clouds about large active space structures

Physics

Scientific paper

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Large Space Structures, Plasma Clouds, Space Plasmas, Spacecraft Contamination, Water, Ion Temperature, Magnetohydrodynamic Waves, Neutral Particles, Positive Ions

Scientific paper

A model for the motion of contaminant water plasma clouds about a large space structure was developed assuming that the contaminant cloud consists of ions such as O(+), H2O(+), and H3O(+) and neutrals such as O, H, OH, and H2O. The model includes emission of Alfven waves from the cloud to carry current along the magnetic field. The numerical solution of the model equations examines the effects of Alfven wave coupling, neutral water density, ion temperature, and initial conditions on the cloud motion. In all the cases considered, it is predicted that the backward moving clouds will develop fingerlike instabilities in the back-side of the clouds. The appearance of these instabilities is in agreement with experimental data.

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