scholarly journals Relativistic Effect of Electrons on Dust Acoustic Solitary waves in unmagnetized plasma

2020 ◽  
Vol 32 (6) ◽  
pp. 36-46
Author(s):  
RIJU KUMAR ◽  
Keyword(s):  
Dusty Plasma ◽  
Solitary Waves ◽  
Relativistic Effect ◽  
Equilibrium Density ◽  
Dust Charge ◽  
Dust Acoustic Solitary Waves ◽  
Dust Acoustic ◽  
Unmagnetized Plasma

In this paper, we study dust acoustic solitary waves (DASW) based on the dust charge Zd =equilibrium density of ions / equilibrium density of dust ions , initial dust speed do Udo and initial streaming speed \nueo of electrons with the introduction of relativistic effect. Only rarefactive solitons are found to exist in the unmagnetized dusty plasma in presence of relativity for electrons. It is observed that for greater values of dust charge Zd rarefactive solitons exist.

Dust-acoustic solitary waves in a finite temperature dusty plasma with variable dust charge and two temperature ions

2004 ◽  
Vol 70 (4) ◽  
pp. 481-495 ◽  
Author(s):  
TARSEM SINGH GILL ◽  
HARVINDER KAUR ◽  
NARESHPAL SINGH SAINI
Keyword(s):  
Mach Number ◽  
Dusty Plasma ◽  
Solitary Waves ◽  
Ion Concentration ◽  
Ion Temperature ◽  
Relative Temperature ◽  
Dust Charge ◽  
Dust Temperature ◽  
Dust Acoustic Solitary Waves ◽  
Dust Acoustic

In this paper, the characteristics of dust-acoustic solitary waves in dusty plasma are studied. Dust charge and temperature are treated as variables. The authors have used the pseudopotential method to investigate the possibility of compressive as well as rarefactive solitons. An expression for the pseudopotential has been derived. The pseudopotential is a function of the Mach number, the relative temperature of low and high ion components, the relative ion concentration of dust charge and the temperature. Numerical computation shows that for the chosen set of parameters, only compressive solitons exist and their amplitudes increase with increasing Mach number. An increase in the dust temperature results in the disappearance of the compressive soliton. It is the only small parameter regime where compressive as well rarefactive solitons coexist. The effect of the relative ion temperature on solitons is also investigated. In the small amplitude limit, an increase in the dust temperature leads to a transition from compressive to rarefactive solitons.

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