Effects of flat-topped ion distribution and dust temperature on small amplitude dust-acoustic solitary waves and double layers in dusty plasma

2010 ◽  
Vol 17 (12) ◽  
pp. 123706 ◽  
Author(s):  
H. Alinejad ◽  
A. A. Mamun
Keyword(s):  
Dusty Plasma ◽  
Solitary Waves ◽  
Small Amplitude ◽  
Double Layers ◽  
Ion Distribution ◽  
Dust Temperature ◽  
Dust Acoustic Solitary Waves ◽  
Dust Acoustic

Large Amplitude Solitary Waves in a Four-Component Dusty Plasma with Nonthermal Ions

2008 ◽  
Vol 63 (7-8) ◽  
pp. 393-399 ◽  
Author(s):  
Prasanta Chatterjee ◽  
Kaushik Roy
Keyword(s):  
Dusty Plasma ◽  
Solitary Waves ◽  
Soliton Solution ◽  
Large Amplitude ◽  
Small Amplitude ◽  
Sagdeev Potential ◽  
Ion Distribution ◽  
Dust Acoustic Solitary Waves ◽  
Dust Acoustic ◽  
Pseudo Potential

Dust acoustic solitary waves are studied in a four-component dusty plasma. Positively and negatively charged mobile dust and Boltzmann-distributed electrons are considered. The ion distribution is taken as nonthermal. The existence of a soliton solution is determined by the pseudo-potential approach. It is shown that in small amplitude approximation our result obtained from the Sagdeev potential technique reproduce the result obtained by Sayed and Mamun [Phys. Plasmas 14, 014501 (2007)] provided one cosiders the nonthermal distribution for ions.

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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