Small amplitude nonlinear electrostatic waves in a collisional complex plasma with positively charged dust

Abstract A theoretical investigation by an all-inclusive adaptation of the PLK strategy is carried out in order to study the inward and outward interaction between two cylindrical and spherical dust acoustic solitary waves (DASWs) in an unmagnetized dusty plasma consisting of nonthermal distributed ions, negatively and positively charged dust grains along with electrons featuring Boltzmann’s distribution. The interactions and collisions between two cylindrical and spherical geometries at different time scales are studied. Also the combined effects of the nonthermality of ions, ion to electron temperature ratio as well as mass ratio of positive to negative dust grains have been studied in detail on the phase shifts raised due to collision. It has been seen that the properties of the cooperation of DASWs in cylindrical and spherical shaped are distinct.

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Non-Thermal and Dust Charge Effects on Surface Ion Waves in Semi-Bound Lorentzian Plasmas

Zeitschrift für Naturforschung A ◽

10.1515/zna-2006-7-803 ◽

2006 ◽

Vol 61 (7-8) ◽

pp. 323-329 ◽

Cited By ~ 1

Author(s):

Jae-Hoon Song ◽

Young-Dae Jung

Keyword(s):

Surface Wave ◽

Phase Velocity ◽

Spectral Index ◽

Charged Dust ◽

Dust Grains ◽

Charge Effects ◽

Long Wavelength ◽

Dust Charge ◽

Ion Waves ◽

Positively Charged

The non-thermal and dust charge effects on a surface electrostatic ion plasma wave are investigated in a semi-bound magnetized dusty Lorentzian plasma. The results show that the phase velocity of the surface wave with negatively charged dust grains is greater than that with positively charged dust grains or that with neutral dust grains. It is also found that the phase velocity increases with increasing the spectral index of the plasma. For the long wavelength domain, however, the phase velocity of the surface wave is found to be almost independent of the spectral index.

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Unperturbed state and solitary structures in an electron-positron plasma having dust impurity and density inhomogeneity

Journal of Plasma Physics ◽

10.1017/s002237781400004x ◽

2014 ◽

Vol 80 (4) ◽

pp. 629-641 ◽

Cited By ~ 4

Author(s):

Hitendra K. Malik ◽

Rakhee Malik

Keyword(s):

Density Gradient ◽

Mkdv Equation ◽

Charged Dust ◽

Unperturbed State ◽

Pair Plasma ◽

Electron Positron ◽

Electrons And Positrons ◽

Solitary Structures ◽

Dust Distribution ◽

Positively Charged

An electron–positron pair plasma having dust impurity and density non-uniformity is studied for its unperturbed state and evolution of solitary structures under the effect of either positively charged or negatively charged dust grains. Zeroth-order equations are solved to examine the unperturbed state of the plasma via unperturbed potential φ0, drift velocities of the electrons and positrons (ve0 and vp0), and plasma (positron) density gradient np0η. It is observed that the dust distribution affects the gradient np0η significantly, which increases very sharply with a small increment in the dust density gradient nd0η. With relation to the solitary structures, a modified form of Korteweg–deVries equation (mKdV equation) is realized in the said plasma, which reveals that a tailing structure is associated with the soliton (sech2 structure). This tail is less prominent in the present pair plasma, contrary to the observation made in ordinary plasmas having only ions and electrons. The dust impurity is found to influence the solitary structure much significantly and its presence suppresses the rarefactive solitons, which are generally observed in multi-component species plasmas.

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