Dynamic vortex dust structures in a nuclear-track plasma

Details Dynamic vortex dust structures in a nuclear-track plasma Dynamic vortex dust structures in a nuclear-track plasma

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003njph....5..129r&link_type=abstract

New Journal of Physics, Volume 5, Issue 1, pp. 129 (2003).

Physics

4

Scientific paper

Results are presented from Monte Carlo calculations of the electric charge on dust grains in a plasma produced during the slowing down of radioactive decay products of californium nuclei in neon. The dust grain charging is explained as being due to the drift of electrons and ions in an external electric field. It is shown that the charges of the grains depend on their coordinates and strongly fluctuate with time. The time-averaged grain charges agree with the experimental data obtained on ordered liquid-like dust structures in a nuclear-track plasma. The time-averaged dust grain charges are used to carry out computer modelling of the formation of dynamic vortex structures observed in experiments. Evidence is obtained for the fact that the electrostatic forces experienced by the dust grains are potential in character. The paper is supplemented by a video clip showing the typical dynamics of the simulated vortex dust structure.

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