Plasma absorption effects on collisions of positively charged dust grains in dusty plasmas

2011 ◽  
Vol 109 (5) ◽  
pp. 056104 ◽  
Author(s):  
Young-Dae Jung ◽  
Woo-Pyo Hong
Keyword(s):  
Dusty Plasmas ◽  
Charged Dust ◽  
Dust Grains ◽  
Plasma Absorption ◽  
Positively Charged

Inward and outward dust acoustic cylindrical and spherical waves interaction in four-component dusty plasma with nonthermal ions

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Uday Narayan Ghosh ◽  
Prasanta Chatterjee ◽  
Barjinder Kaur
Keyword(s):  
Dusty Plasma ◽  
Charged Dust ◽  
Dust Grains ◽  
Mass Ratio ◽  
Temperature Ratio ◽  
Spherical Waves ◽  
Dust Acoustic ◽  
Waves Interaction ◽  
Positively Charged ◽  
Different Time Scales

Abstract A theoretical investigation by an all-inclusive adaptation of the PLK strategy is carried out in order to study the inward and outward interaction between two cylindrical and spherical dust acoustic solitary waves (DASWs) in an unmagnetized dusty plasma consisting of nonthermal distributed ions, negatively and positively charged dust grains along with electrons featuring Boltzmann’s distribution. The interactions and collisions between two cylindrical and spherical geometries at different time scales are studied. Also the combined effects of the nonthermality of ions, ion to electron temperature ratio as well as mass ratio of positive to negative dust grains have been studied in detail on the phase shifts raised due to collision. It has been seen that the properties of the cooperation of DASWs in cylindrical and spherical shaped are distinct.

Non-Thermal and Dust Charge Effects on Surface Ion Waves in Semi-Bound Lorentzian Plasmas

2006 ◽  
Vol 61 (7-8) ◽  
pp. 323-329 ◽  
Author(s):  
Jae-Hoon Song ◽  
Young-Dae Jung
Keyword(s):  
Surface Wave ◽  
Phase Velocity ◽  
Spectral Index ◽  
Charged Dust ◽  
Dust Grains ◽  
Charge Effects ◽  
Long Wavelength ◽  
Dust Charge ◽  
Ion Waves ◽  
Positively Charged

The non-thermal and dust charge effects on a surface electrostatic ion plasma wave are investigated in a semi-bound magnetized dusty Lorentzian plasma. The results show that the phase velocity of the surface wave with negatively charged dust grains is greater than that with positively charged dust grains or that with neutral dust grains. It is also found that the phase velocity increases with increasing the spectral index of the plasma. For the long wavelength domain, however, the phase velocity of the surface wave is found to be almost independent of the spectral index.

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.

Self-discharging Of Positively Charged Dust Grains

2011 ◽  
Author(s):  
M. Beránek ◽  
J. Pavlu ◽  
I. Richterová ◽  
J. Vaverka ◽  
J. Šafránková ◽  
...  
Keyword(s):  
Charged Dust ◽  
Dust Grains ◽  
Positively Charged

scholarly journals Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

2020 ◽  
Author(s):  
Shahid Ali ◽  
Yas Al-Hadeethi
Keyword(s):  
Dusty Plasmas ◽  
Diagnostic Methods ◽  
Charged Dust ◽  
Dust Grains ◽  
Plasma Diagnostic ◽  
Acoustic Oscillations ◽  
Plasma Parameters ◽  
Charge Potential ◽  
Test Charge ◽  
Electrons And Ions

Different plasma diagnostic methods are briefly discussed, and the framework of a test charge technique is effectively used as diagnostic tool for investigating interaction potentials in Lorentzian plasma, whose constituents are the superthermal electrons and ions with negatively charged dust grains. Applying the space-time Fourier transformations to the linearized coupled Vlasov-Poisson equations, a test charge potential is derived with a modified response function due to energetic ions and electrons. For a test charge moving much slower than the dust-thermal speed, there appears a short-range Debye-Hückel (DH) potential decaying exponentially with distance and a long-range far-field (FF) potential as the inverse cube of the distance from test charge. The FF potentials exhibit more localized shielding curves for low-Kappas, and smaller effective shielding length is observed in dusty plasma compared to electron-ion plasma. However, a wakefield (WF) potential is formed behind the test charge when it resonates with dust-acoustic oscillations, whereas a fast moving test charge leads to the Coulomb potential having no shielding around. It is revealed that superthermality and plasma parameters significantly alter the DH, FF, and WF potentials in space plasmas of Saturn’s E-ring, where power-law distributions can be used for energetic electrons and ions in contrast to Maxwellian dust grains.

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