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Effects of nonlinear plasma wake field on the dust-lattice wave in complex plasmas

Published online by Cambridge University Press:  16 January 2017

Myoung-Jae Lee  and
Young-Dae Jung
Myoung-Jae Lee
Affiliation:
Department of Physics, Hanyang University, Seoul 04763, South Korea Research Institute for Natural Sciences, Hanyang University, Seoul 04763, South Korea
Young-Dae Jung*
Affiliation:
Department of Electrical and Computer Engineering, MC 0407, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0407, USA Department of Applied Physics and Department of Bionanotechnology, Hanyang University, Ansan, Kyunggi-Do 15588, South Korea
*
†Email address for correspondence: ydjung@hanyang.ac.kr
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Abstract

The influence of a nonlinear ion wake field on the dust-lattice wave is investigated in complex dusty plasmas. The dispersion relation for the dust-lattice wave is derived from the equation of motion including the contribution due to the nearest-neighbour dust grain interaction. The results show that the nonlinear wake-field effect increases the wave frequency, especially at the maximum peak positions. It is found that the oscillatory behaviour of the dust-lattice wave enhances with an increase of the spacing of the dust grains. It is also found that the amplitude of the dust-lattice wave significantly decreases with an increase of the inter-dust grain distance. In addition, it is found that the amplitude of the dust-lattice wave increases with increasing Debye length. The variation of the dust-lattice wave due to the Mach number and plasma parameters is also discussed.

Keywords

complex plasmas
Type
Research Article
Information
Journal of Plasma Physics , Volume 83 , Issue 1 , February 2017 , 905830103
Copyright
© Cambridge University Press 2017 

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