Effect of superthermal electrons on dust-acoustic shock waves in coupled dusty plasmas

2012 ◽  
Vol 79 (1) ◽  
pp. 97-103
Author(s):  
HAMID REZA PAKZAD ◽  
MOULOUD TRIBECHE
Keyword(s):  
Shock Waves ◽  
Low Frequency ◽  
Dusty Plasmas ◽  
Dust Particles ◽  
Superthermal Electrons ◽  
Plasma Parameters ◽  
Strongly Coupled ◽  
Dust Acoustic ◽  
Strongly Coupled Dusty Plasma ◽  
Kappa Distributed Electrons

AbstractNonlinear dust-acoustic (DA) shock waves in coupled dusty plasmas with negative dust grains and kappa-distributed electrons are discussed. Using a generalized hydrodynamic model, the dispersion relation and the Korteweg–de Vries-Burger (KdVB) equation for low-frequency DA modes in a strongly coupled dusty plasma are derived. The dependence of shock waves on various plasma parameters is then explored. A solitonic profile may be converted into a shock structure when correlation among dust particles becomes stronger. The amplitude as well as the steepness of shock waves increases with increasing the value of the spectral index k.

Effect of q-nonextensive distribution of electrons on dust acoustic shock waves in strongly coupled dusty plasmas

2011 ◽  
Vol 89 (10) ◽  
pp. 1073-1078 ◽  
Author(s):  
Hamid Reza Pakzad
Keyword(s):  
Shock Waves ◽  
Acoustic Waves ◽  
Burgers Equation ◽  
Dusty Plasmas ◽  
Reductive Perturbation Method ◽  
Nonlinear Propagation ◽  
Nonextensive Electrons ◽  
Strongly Coupled ◽  
Dust Acoustic ◽  
Nonextensive Distribution

The reductive perturbation method is used to derive the Kordeweg – de Vries – Burgers equation in strongly coupled dusty plasmas containing Boltzmann distributed ions and q-nonextensive electrons. It is observed that the nonlinear propagation of the dust acoustic waves gives rise to shock structures when there is strong correlation among the dust grains. The effect of the q-nonextensive parameter on the shock waves is discussed.

Effects of polarization force and fast electrons on DA shock waves in a strongly coupled dusty plasma

2012 ◽  
Vol 79 (1) ◽  
pp. 1-6 ◽  
Author(s):  
S. PERVIN ◽  
S. S. DUHA ◽  
M. ASADUZZAMAN ◽  
A. A. MAMUN
Keyword(s):  
Shock Waves ◽  
Dusty Plasma ◽  
Charged Dust ◽  
Plasma System ◽  
Strongly Coupled ◽  
Polarization Force ◽  
Dust Acoustic ◽  
Basic Features ◽  
Strongly Coupled Dusty Plasma ◽  
Dusty Plasma System

AbstractA strongly coupled dusty plasma system consisting of non-thermal electrons, Maxwellian ions, and negatively charged dust in presence of polarization force has been considered. The nonlinear propagation of dust-acoustic shock waves in such a dusty plasma system has been theoretically investigated by employing the reductive perturbation method. The effects of the polarization force and non-thermal electrons, on the properties of these dust-acoustic shock waves are briefly discussed. It is shown that the strong correlation among the charged dust grains is a source of dissipation, and is responsible for the formation of the dust-acoustic shock waves. It has been found that the effects of polarization force and non-thermal electrons significantly modify the basic features of such shock waves. It has been proposed to design a new laboratory experiment, which will be able to identify the basic features of the dust-acoustic shock waves predicted in this present investigation.

Time-dependent non-planar dust-acoustic solitary and shock waves in strongly coupled adiabatic dusty plasma

2012 ◽  
Vol 79 (3) ◽  
pp. 249-255 ◽  
Author(s):  
M. S. RAHMAN ◽  
B. SHIKHA ◽  
A. A. MAMUN
Keyword(s):  
Shock Waves ◽  
Dusty Plasmas ◽  
Time Dependent ◽  
Planar Geometry ◽  
Charged Dust ◽  
Dust Grains ◽  
Strongly Coupled ◽  
And Shock Waves ◽  
Dust Acoustic ◽  
Solitary And Shock Waves

AbstractTime-dependent cylindrical and spherical dust-acoustic (DA) solitary and shock waves propagating in a strongly coupled dusty plasmas (containing strongly correlated negatively charged dust grains and weakly correlated adiabatic electrons and ions) are investigated. It is shown that cylindrical and spherical DA solitary and shock waves exist with negative potential, and that the strong correlation between the charged dust grains is a source of dissipation, and is responsible for the formation of cylindrical or spherical DA shock structures. It is also shown that the effects of a non-planar geometry (cylindrical and spherical) significantly modify the basic features (e.g. amplitude, width, speed, etc.) of DA solitary and shock waves. The implications of our results in laboratory experiments are briefly discussed.

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