Numerical study of the sheath in magnetized dusty plasma with two-temperature electrons

2014 ◽  
Vol 81 (1) ◽  
Author(s):  
I. Driouch ◽  
H. Chatei ◽  
M. El Bojaddaini
Keyword(s):  
Dusty Plasma ◽  
Numerical Study ◽  
Plasma Sheath ◽  
Hot Electrons ◽  
Dust Grains ◽  
Magnetized Dusty Plasma ◽  
Positive Ions ◽  
Different Temperatures ◽  
Dimensionless Variables ◽  
Two Temperature

Fluid simulations are used to investigate a multi-component magnetized dusty plasma sheath. The model consists of positive ions, dust grains, and two species of electron populations. These electrons are assumed to be a sum of two Maxwellian distributions with two different temperatures (cold and hot). According to multi-fluid equations and some dimensionless variables, the dimensionless equations are obtained and solved numerically. The effect of the presence of the hot electrons in the sheath is examined. A significant change is observed in the quantities characterizing the sheath with respect to one species electrons (cold) assumption.

Effects of dust grain charge fluctuation on an obliquely propagating dust acoustic solitary potential in a magnetized dusty plasma

2000 ◽  
Vol 63 (2) ◽  
pp. 191-200 ◽  
Author(s):  
A. A. MAMUN ◽  
M. H. A. HASSAN
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Dusty Plasma ◽  
Finite Amplitude ◽  
Reductive Perturbation Method ◽  
Charge Fluctuation ◽  
Dust Grains ◽  
Magnetized Dusty Plasma ◽  
Dust Acoustic ◽  
Dust Grain

Effects of dust grain charge fluctuation, obliqueness and external magnetic field on a finite-amplitude dust acoustic solitary potential in a magnetized dusty plasma, consisting of electrons, ions and charge-fluctuating dust grains, are investigated using the reductive perturbation method. It is shown that such a magnetized dusty plasma system may support a dust acoustic solitary potential on a very slow time scale involving the motion of dust grains, whose charge is self- consistently determined by local electron and ion currents. The effects of dust grain charge fluctuation, external magnetic field and obliqueness are found to modify the properties of this dust acoustic solitary potential significantly. The implications of these results for some space and astrophysical dusty plasma systems, especially planetary ring systems and cometary tails, are briefly mentioned.

Density and temperature effects on a surface electron-acoustic wave in a semi-bounded dusty plasma of two-temperature electrons

2007 ◽  
Vol 73 (4) ◽  
pp. 433-438 ◽  
Author(s):  
DAE-HAN KI ◽  
YOUNG-DAE JUNG
Keyword(s):  
Acoustic Wave ◽  
Phase Velocity ◽  
Dusty Plasma ◽  
Plasma Wave ◽  
Hot Electrons ◽  
Surface Electron ◽  
Electron Acoustic Wave ◽  
Cold Electrons ◽  
Electron Acoustic ◽  
Two Temperature

AbstractThe effects of density and temperature on a surface electron-acoustic plasma wave are investigated in a semi-bounded dusty plasma of two-temperature electrons. The dispersion relation of the surface electron-acoustic plasma wave is obtained by the plasma dielectric function with the specular reflection boundary condition. The phase velocity is found to be decreased when increasing the ratio of the temperature of hot electrons to that of cold electrons for large wave numbers. It is also found that the phase velocity increases with an increase in the ratio of the density of hot electrons to that of cold electrons and that the phase velocity of the surface electron-acoustic wave increases with an increase in the density of the dust grains.

Nonlinear propagation of lower-hybrid-like waves in a dusty plasma

1997 ◽  
Vol 57 (2) ◽  
pp. 299-310 ◽  
Author(s):  
O. P. SAH
Keyword(s):  
Dusty Plasma ◽  
Hot Electrons ◽  
Nonlinear Propagation ◽  
Lower Hybrid ◽  
Charged Dust ◽  
Hot Electron ◽  
Dust Grains ◽  
Mass Ratio ◽  
Nonlinear Structure ◽  
Positively Charged

The existence and properties of nonlinear lower-hybrid-like waves in a dusty plasma are discussed. It is found that both rarefactive and compressive types of solitons can exist in the presence of isothermal hot electrons and negatively charged dust grains. Only compressive solitons are found to occur when the dust grains are positively charged or the hot electrons are non-isothermal. The amplitude, velocity, width and nature of the nonlinear structure are greatly affected by the hot electron concentration as well as by the charge-to-mass ratio of the dust grains.

scholarly journals Depression and Excitation of Buneman’s Instability in Two Ions Species Magnetized Dusty Plasma

2020 ◽  
Author(s):  
Haifa Alyoussef
Keyword(s):  
Diffusion Equation ◽  
Theoretical Method ◽  
One Dimension ◽  
Thermal Velocity ◽  
Dust Grains ◽  
Temperature Ratio ◽  
Plasma Inhomogeneity ◽  
Magnetized Dusty Plasma ◽  
Different Temperatures ◽  
Ion Species

Abstract In this research, theoretical method was used to examine the excitation and depression state for two-stream Buneman’s instability (BI) when we assumed an inhomogeneous, anisotropic, multi ions species with the presence of dust grains in plasma. The plasma also studied at different temperatures state. The diffusion equation was also derived and solved in one dimension for the Buneman’s instabilities that arise in such a situation within plasma. We develop the single-ion theory into a multiple-ion-species theory. This study concluded that: degree of plasma inhomogeneity, electron to ions temperature ratio, multi ions species and dust grains which have thermal velocity play a very important role in the depression and excitation of instability such Buneman’s instability.

The effect of charge separation on nonlinear electrostatic waves in a magnetized dusty plasma with two-temperature ions

2008 ◽  
Author(s):  
S. K. Maharaj ◽  
R. Bharuthram ◽  
S. R. Pillay ◽  
S. V. Singh ◽  
R. V. Reddy ◽  
...  
Keyword(s):  
Dusty Plasma ◽  
Charge Separation ◽  
Electrostatic Waves ◽  
Magnetized Dusty Plasma ◽  
Two Temperature

Nonlinear electrostatic waves in a magnetized dusty plasma with two-temperature ions

2008 ◽  
Author(s):  
S. K. Maharaj ◽  
R. Bharuthram ◽  
S. R. Pillay ◽  
S. V. Singh ◽  
R. V. Reddy ◽  
...  
Keyword(s):  
Dusty Plasma ◽  
Electrostatic Waves ◽  
Magnetized Dusty Plasma ◽  
Two Temperature

Nonlinear oscillations in a magnetized dusty plasma with two-temperature trapped ions

2009 ◽  
Vol 40 (2) ◽  
pp. 758-765 ◽  
Author(s):  
Shalini Bagchi ◽  
Amar P. Misra ◽  
K. Roy Chowdhury ◽  
A. Roy Chowdhury
Keyword(s):  
Dusty Plasma ◽  
Nonlinear Oscillations ◽  
Trapped Ions ◽  
Magnetized Dusty Plasma ◽  
Two Temperature
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