scholarly journals Computation of dust charge and potential on a static spherical dust grain immersed in rf discharges

2008 ◽  
Vol 15 (12) ◽  
pp. 123704 ◽  
Author(s):  
V. R. Ikkurthi ◽  
K. Matyash ◽  
A. Melzer ◽  
R. Schneider
Keyword(s):  
Rf Discharges ◽  
Dust Charge ◽  
Dust Grain

Dust grain charging in RF discharges

2010 ◽  
Vol 19 (2) ◽  
pp. 025002 ◽  
Author(s):  
M Bacharis ◽  
M Coppins ◽  
J E Allen
Keyword(s):  
Rf Discharges ◽  
Dust Grain

Small-amplitude electrostatic solitary waves in a dusty plasma with variable charge resonant trapped dust particles

2007 ◽  
Vol 73 (6) ◽  
pp. 901-910 ◽  
Author(s):  
LEILA AIT GOUGAM ◽  
MOULOUD TRIBECHE ◽  
FAWZIA MEKIDECHE
Keyword(s):  
Solitary Waves ◽  
Small Amplitude ◽  
Charge Trapping ◽  
Dusty Plasmas ◽  
Dust Particles ◽  
Plasma Parameters ◽  
Variable Charge ◽  
Dust Charge ◽  
Temperature Equilibrium ◽  
Dust Grain

AbstractSmall-amplitude electrostatic solitary waves are investigated in unmagnetized dusty plasmas with variable charge resonant trapped dust particles. It is found that under certain conditions spatially localized structures, the height and nature of which depend sensitively on the plasma parameters, can exist. The effects of dust grain temperature, equilibrium dust charge, trapping parameter, and dust size on the properties of these solitary waves are briefly discussed. A neural network with a given architecture and learning process, and which may be useful to interpret experimental data, is outlined. Our investigation may be taken as a prerequisite for the understanding of the solitary dust waves that may occur in space as well as in laboratory plasmas.

Effects of Grain Size on the Bremsstrahlung Spectrum of Electron-Dust Grain Collisions in Dusty Plasmas

2009 ◽  
Vol 64 (3-4) ◽  
pp. 229-232
Author(s):  
Seo-Hee Kim ◽  
Young-Dae Jung
Keyword(s):  
Grain Size ◽  
Cross Section ◽  
Dusty Plasmas ◽  
Bremsstrahlung Spectrum ◽  
Final States ◽  
Bremsstrahlung Radiation ◽  
Dust Charge ◽  
Bremsstrahlung Emission ◽  
Debye Radius ◽  
Dust Grain

Abstract The grain size effects on the bremsstrahlung emission spectrum due to nonrelativisitc electrondust grain collisions are investigated in dusty plasmas. Using the Born approximation for the initial and final states of the projectile electron, the bremsstranhlung radiation cross section is obtained as a function of the grain size, dust charge, Debye radius, collision energy, and radiation photon energy. It is found that the effects of the grain size enhance the bremsstrahlung radiation cross section, especially for soft-photon radiations. The effect of the Debye radius on the bremsstrahlung cross section is found to be increased with an increase of the magnitude of the charge number of the dust grain. In addition, the grain size effect on the bremsstrahlung spectrum is found to be more significant for highly charged dusty grains

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.

Computation of ion drag force on a static spherical dust grain immersed in rf discharges

2009 ◽  
Vol 16 (4) ◽  
pp. 043703 ◽  
Author(s):  
V. R. Ikkurthi ◽  
K. Matyash ◽  
A. Melzer ◽  
R. Schneider
Keyword(s):  
Drag Force ◽  
Rf Discharges ◽  
Dust Grain

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.

scholarly journals Nonlinear Dynamics of the Dust Grain Charge and Dust Acoustic Waves in a Plasma with an Ion Beam

1999 ◽  
Vol 52 (1) ◽  
pp. 37 ◽  
Author(s):  
Y. N. Nejoh
Keyword(s):  
Acoustic Waves ◽  
Ion Beam ◽  
Laboratory Plasma ◽  
Ion Density ◽  
Dust Acoustic Waves ◽  
Dust Charge ◽  
Dust Acoustic ◽  
Density Ratios ◽  
Dust Grain ◽  
Short Time

The temporal evolution of the dust grain charge is investigated for the first time in a dusty plasma with an ion beam. The grain charge attains to the stationary state after the fluctuation of short time. The dust charge increases as the ion beam temperature and the plasma ion density increase, but decreases as the beam density increases. The speed of the wave increases as the ion density and temperature increase, whereas it decreases as the dust charge increases. The variable dust mass-to-charge and ion-to-electron density ratios govern the existence of dust acoustic waves. The findings of this investigation may be useful in understanding laboratory plasma phenomena.

Effects of vortex-like (trapped) electron distribution on non-linear dust-acoustic waves with positive dust charge fluctuation

2010 ◽  
Vol 76 (3-4) ◽  
pp. 477-485 ◽  
Author(s):  
M. R. AMIN ◽  
SANJIT K. PAUL ◽  
GURUDAS MANDAL ◽  
A. A. MAMUN
Keyword(s):  
Dusty Plasma ◽  
Acoustic Waves ◽  
Electron Distribution ◽  
Reductive Perturbation Method ◽  
Nonlinear Propagation ◽  
Charge Fluctuation ◽  
Dust Charge ◽  
Dust Acoustic ◽  
Dust Grain ◽  
Trapped Electron

AbstractThe nonlinear propagation of dust-acoustic (DA) waves in a dusty plasma consisting of Boltzmann-distributed ions, vortex-like distributed electrons and mobile charge fluctuating positive dust has been investigated by employing the reductive perturbation method. The effects of dust grain charge fluctuation and the vortex-like electron distribution are found to modify the properties of the DA solitary waves significantly. The implications of these results for some space and astrophysical dusty plasma systems are briefly mentioned.

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