Effect of superthermal electrons on dust-acoustic shock waves in coupled dusty plasmas
Abstract
Nonlinear dust-acoustic (DA) shock waves in coupled dusty plasmas with negative dust grains and kappa-distributed electrons are discussed. Using a generalized hydrodynamic model, the dispersion relation and the Korteweg-de Vries-Burger (KdVB) equation for low-frequency DA modes in a strongly coupled dusty plasma are derived. The dependence of shock waves on various plasma parameters is then explored. A solitonic profile may be converted into a shock structure when correlation among dust particles becomes stronger. The amplitude as well as the steepness of shock waves increases with increasing the value of the spectral index k.
- Publication:
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Journal of Plasma Physics
- Pub Date:
- February 2013
- DOI:
- 10.1017/S0022377812000797
- Bibcode:
- 2013JPlPh..79...97P