Collapse of Nonlinear Dust Sound Pulses in Cylindrical Dusty Plasma Waveguides

Volodymyr Grimalsky^1*, Svetlana Koshevaya¹, Anatoliy Kotsarenko², Alvaro Zamudio-Lara¹

¹CIICAp, Autonomous University of State Morelos (UAEM), Cuernavaca, Mexico.
²Faculty of Engineering, Autonomous University of Carmen (UNACAR), Ciudad Del Carmen, Mexico.

DOI: 10.4236/jemaa.2015.73010                

Abstract

Nonlinear monopulses of dust sound waves in cylindrical dusty plasma waveguides bounded by a dielectric are investigated. The dusty plasma includes the positive ions as a light component and the negative dust as a heavy one. The dusty plasma with different masses of dust particles is considered. The set of hydrodynamic equations for the dust jointly with the Poisson one are used. The Boltzmann distribution is valid for the ions. The boundary conditions are applied at the smooth interface. When the moderate volume nonlinearity manifests, near the interface the variations of the dust concentration reach extremely high values, and the collapse of the dust sound waves occurs. In the cylindrical waveguides the collapse manifests at the values of the initial wave amplitudes essentially smaller than in the planar geometry. When the particles of lower masses are near the interface, the collapse realizes more rapidly.

Keywords

Dusty Plasma, Cylindrical Waveguide, Different Masses, Wave Collapse

Conflicts of Interest

The authors declare no conflicts of interest.

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