scholarly journals Weibel instability oscillation in a dusty plasma with counter-streaming electrons

2020 ◽  
Vol 38 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Daljeet Kaur ◽  
Suresh C. Sharma ◽  
R.S. Pandey ◽  
Ruby Gupta
Keyword(s):  
Growth Rate ◽  
Dusty Plasma ◽  
Relative Number ◽  
Dust Grains ◽  
Electromagnetic Mode ◽  
Weibel Instability ◽  
Dust Charge ◽  
Second Mode ◽  
Dust Charge Fluctuations ◽  
Dust Grain

AbstractWe investigate the Weibel instability (WI) in a dusty plasma which is driven to oscillation by the addition of dust grains in the plasma. Our analysis predicts the existence of three modes in a dusty plasma. There is a high-frequency electromagnetic mode, whose frequency increases with an increase in the relative number density of dust grains and which approaches instability due to the presence of dust grains. The second mode is a damping mode which exists due to dust charge fluctuations in plasma. The third mode is the oscillating WI mode. The dispersion relation and the growth rate of various modes in the dusty plasma are derived using the first-order perturbation theory. The effect of dust grain parameters on frequency and growth rate is also studied and reported.

Effect of dust charge fluctuations on upper hybrid wave instabilities in magnetized dusty plasma

2014 ◽  
Vol 32 ◽  
pp. 1460350 ◽  
Author(s):  
Jyotsna Sharma ◽  
Ajay Gahlot ◽  
Suresh C. Sharma ◽  
V. K. Jain
Keyword(s):  
Growth Rate ◽  
Dusty Plasma ◽  
Unstable Wave ◽  
Lower Hybrid ◽  
Hybrid Wave ◽  
Charge Fluctuations ◽  
Electrostatic Wave ◽  
Dust Charge ◽  
Magnetized Dusty Plasma ◽  
Dust Charge Fluctuations

The decay instability of an upper hybrid electrostatic wave into an upper hybrid sideband wave and lower hybrid wave is studied in magnetized dusty plasma. A local theory of this process has been developed. The growth rate and mode frequencies of the unstable wave were evaluated based on existing dusty plasma parameters and it is found that the unstable mode frequency and growth rate increases with δ (ion-to-electron density ratio) in the presence and absence of dust charge fluctuations in addition to dust dynamics.

Dust-induced instability with dust charge fluctuations in a rotating dusty plasma

2020 ◽  
Vol 74 (6) ◽  
Author(s):  
Xiao-Song Yang ◽  
Bing Wang ◽  
Hui Chen ◽  
Xiao-Chang Chen ◽  
San-Qiu Liu
Keyword(s):  
Dusty Plasma ◽  
Charge Fluctuations ◽  
Dust Charge ◽  
Dust Charge Fluctuations

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.

Effects of dust size distribution on nonlinear magnetosonic wave in a dusty plasma

2020 ◽  
pp. 2150121
Author(s):  
Bo Liu ◽  
Juan Fang Han ◽  
Wen Shan Duan
Keyword(s):  
Solitary Wave ◽  
Size Distribution ◽  
Dusty Plasma ◽  
Propagation Velocity ◽  
Magnetosonic Wave ◽  
Dust Grains ◽  
Minimum Radius ◽  
Dust Size Distribution ◽  
The Difference ◽  
Dust Grain

Both the linear and the nonlinear magnetosonic wave in a multi-component dusty plasma are studied in the present paper. The dependence of the dispersion relation of the linear waves on the dust size distribution are given. It seems that the larger the difference between the maximum and the minimum radius of the dust grains, the lower the wave frequency for all cases of the dust size distribution. Furthermore, it is noted that the width, the amplitude and the propagation velocity of the KdV solitary wave depend on the dust size distribution, especially it depend on whether the number density of the larger sized dust grain is larger or smaller than that of the smaller sized dust grain. For the power law dust size distribution, the width and the propagation velocity of the KdV solitary wave between the maximum and the minimum radius of the dust grains is larger than that of mono-sized dusty plasma.

scholarly journals Radiation forces between dust grains in a plasma

2008 ◽  
Vol 74 (2) ◽  
pp. 145-150
Author(s):  
J. T. MENDONÇA ◽  
L. STENFLO
Keyword(s):  
Incident Radiation ◽  
Repulsive Force ◽  
Repulsive Interaction ◽  
Dust Grains ◽  
Physical Conditions ◽  
Dust Charge ◽  
Radiation Forces ◽  
Definition Of ◽  
General Physical ◽  
Dust Grain

AbstractIn this work we show that a repulsive force between nearby dust grains in a plasma can exist, due to scattering of the incident radiation. Two types of forces are discussed, one of them being formally identical to electrostatic repulsion. This leads to the definition of an effective dust charge of the dust grain, which only depends on the scattering process. Our discussion shows that such a repulsive interaction occurs in quite general physical conditions.

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