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Spatiotemporal evolution of vortex dust structures in a track plasma

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Abstract

Results are presented from experimental studies of the behavior of dust grains in a track plasma produced by an accelerated proton beam. Dynamic dust structures in such a plasma are obtained for the first time, and their spatiotemporal evolution is thoroughly investigated. The structures develop from a dust spiral, which abruptly transforms with increasing dust density into a differentially rotating dust cloud across which dust-sound waves (including spiral waves generated by the dense central core) propagate. As time elapses, the dust cloud loses its fragments and gradually vanishes. At constant experimental conditions, the lifetime of the structures attains a few minutes.

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Original Russian Text © V.E. Fortov, A.M. Fridman, V.A. Rykov, V.I. Vladimirov, L.V. Deputatova, P.P. D’yachenko, K.V. Rykov, 2006, published in Fizika Plazmy, 2006, Vol. 32, No. 7, pp. 640–645.

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Fortov, V.E., Fridman, A.M., Rykov, V.A. et al. Spatiotemporal evolution of vortex dust structures in a track plasma. Plasma Phys. Rep. 32, 588–592 (2006). https://doi.org/10.1134/S1063780X06070075

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  • DOI: https://doi.org/10.1134/S1063780X06070075

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