Numerical simulation of a radially injected barium cloud

Details Numerical simulation of a radially injected barium cloud Numerical simulation of a radially injected barium cloud

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....8611379s&link_type=abstract

Journal of Geophysical Research, vol. 86, Dec. 1, 1981, p. 11379-11387.

Physics

Barium Ion Clouds, Computerized Simulation, Ion Injection, Electron Density (Concentration), Ion Density (Concentration), Magnetohydrodynamic Stability, Polarized Radiation, Solar Radiation, Ultraviolet Radiation

Scientific paper

Electrostatic two-dimensional numerical simulations of a radially symmetric barium injection experiment demonstrate that ions created by solar UV irradiation are electrostatically bound to the electrons which remain tied to the field lines on which they are created. Two possible instabilities are identified, but neither of them causes the barium plasma cloud to polarize in a way that would permit the plasma to keep up with the neutrals. In a second model, the velocity of the neutrals is allowed to be a function of the azimuthal angle. Here, a portion of the cloud does polarize in a way that allows a portion of the plasma to detach and move outward at the approximate speed of the neutrals. No rapid detachment is found when only the density of the neutrals is given an azimuthal asymmetry.

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