Effect of secondary electron emission on nonlinear dust acoustic wave propagation in a complex plasma with negative equilibrium dust charge

2017 ◽  
Vol 24 (2) ◽  
pp. 023704 ◽  
Author(s):  
Subrata Bhakta ◽  
Uttam Ghosh ◽  
Susmita Sarkar
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Acoustic Wave Propagation ◽  
Dust Acoustic Wave ◽  
Complex Plasma ◽  
Dust Charge ◽  
Dust Acoustic

Nonlinear dust-acoustic wave propagation in a Lorentzian dusty plasma in presence of negative ions

2018 ◽  
Vol 84 (5) ◽  
Author(s):  
Raicharan Denra ◽  
Samit Paul ◽  
Uttam Ghosh ◽  
Susmita Sarkar
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Negative Ions ◽  
Negative Ion ◽  
Acoustic Wave Propagation ◽  
Dust Acoustic Wave ◽  
Charge Variation ◽  
Dust Charge ◽  
Dust Acoustic ◽  
Adiabatic Dust Charge Variation

In this paper we have studied the effect of the density and temperature of negative ions on the nonlinear dust-acoustic wave propagation in a Lorentzian dusty plasma. We have considered both adiabatic and non-adiabatic dust charge variation. The presence of both low and high populations of negative ions are considered. Separate models have been developed because the two populations give rise to opposite polarity of grain charges. In both models electrons are assumed to follow a kappa velocity distribution while the positive and negative ions satisfy a Maxwellian velocity distribution. Adiabatic dust charge variation shows the propagation of a dust-acoustic soliton in cases of both a high and low population of negative ions whose amplitude depends on the negative ion temperature and negative ion density. On the other hand, non-adiabatic dust charge variation generates a stable oscillatory dust-acoustic shock when the negative ion population is low. An unstable potential has been predicted from this analysis when the negative ion population is high and the dust charge variation is non-adiabatic.

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