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Dust size distribution for dust acoustic waves in a magnetized dusty plasma

Duan, Wen-shan and Parkes, John (2003) Dust size distribution for dust acoustic waves in a magnetized dusty plasma. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 68 (6). 067402. ISSN 1063-651X

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Abstract

A reasonable normalization for a magnetized dusty plasma with many different dust grains is adopted, which varies self-consistently with the system parameters. A Zakharov-Kuznetsov equation for small but finite amplitude dust acoustic waves is obtained for magnetized dusty plasma which contains different dust grains by using the reductive perturbation technique. We study the dust size distribution. Some comparisons are made between dusty plasma in which the dust size distribution is considered, and the monosized dusty plasma in which there is only one kind of dust grain whose size is the average dust size. This suggests that both soliton velocity and width are larger than that for monosized dusty plasma, but its amplitude is smaller than that for monosized dusty plasma. If there are positively charged dust grains, compressive solitary waves may exist. The velocity, amplitude, and width of a soliton in multidimensional form for a magnetized dusty plasma which contains many different dust grains are studied as well.