The calculation of grain charge in a dense dusty plasma with a nonuniform surface potential

2002 ◽  
Vol 29 (9) ◽  
pp. 1277-1282 ◽  
Author(s):  
L. Bringol-Barge ◽  
T.W. Hyde
Keyword(s):  
Dusty Plasma ◽  
Surface Potential ◽  
Nonuniform Surface

Dust grain surface potential in a non-Maxwellian dusty plasma with negative ions

2013 ◽  
Vol 79 (6) ◽  
pp. 1117-1121 ◽  
Author(s):  
A. A. ABID ◽  
S. ALI ◽  
R. MUHAMMAD
Keyword(s):  
Dusty Plasma ◽  
Surface Potential ◽  
Density Ratio ◽  
Negative Ions ◽  
Negative Ion ◽  
Plasma Parameters ◽  
Laboratory Plasmas ◽  
Dust Grain ◽  
Grain Surface ◽  
Dust Charging

AbstractDust charging processes involving the collection of electrons and positive/negative ions in a non-equilibrium dusty plasma are revisited by employing the power-law kappa (κ)-distribution function. In this context, the current balance equation is solved to obtain dust grain surface potential in the presence of negative ions. Numerically, it is found that plasma parameters, such as the κ spectral index, the negative ion-to-electron temperature ratio (γ), the negative–positive ion number density ratio (α), and the negative ion streaming speed (U0) significantly modify the dust grain potential profiles. In particular, for large kappa values, the dust grain surface potential reduces to the Maxwellian case, and at lower kappa values the magnitude of the negative dust surface potential increases. An increase in γ and U0 leads to the enhancement of the magnitude of the dust grain surface potential, while α leads to an opposite effect. The relevance of present results to low-temperature laboratory plasmas is discussed.

Dust surface potential in a generalized (r , q )-distributed multi-ion dusty plasma

2018 ◽  
Vol 58 (10) ◽  
pp. 976-984 ◽  
Author(s):  
S. Ali ◽  
A.A. Abid ◽  
J. Du ◽  
A.A. Mamun
Keyword(s):  
Dusty Plasma ◽  
Surface Potential ◽  
Dust Surface

The effects of surface absorbed monolayer microdiffraction patterns

1988 ◽  
Vol 46 ◽  
pp. 680-681
Author(s):  
M. Pan ◽  
J.M. Cowley
Keyword(s):  
Surface Potential ◽  
Electron Probe ◽  
Potential Distribution ◽  
Crystal Surface ◽  
Normal Direction ◽  
Surface Image ◽  
Extended Surface ◽  
Gas Molecules ◽  
Surface Nature ◽  
Electron Microdiffraction

Electron microdiffraction patterns, obtained when a small electron probe with diameter of 10-15 Å is directed to run parallel to and outside a flat crystal surface, are sensitive to the surface nature of the crystals. Dynamical diffraction calculations have shown that most of the experimental observations for a flat (100) face of a MgO crystal, such as the streaking of the central spot in the surface normal direction and (100)-type forbidden reflections etc., could be explained satisfactorily by assuming a modified image potential field outside the crystal surface. However the origin of this extended surface potential remains uncertain. A theoretical analysis by Howie et al suggests that the surface image potential should have a form different from above-mentioned image potential and also be smaller by several orders of magnitude. Nevertheless the surface potential distribution may in practice be modified in various ways, such as by the adsorption of a monolayer of gas molecules.

Inductively-coupled dusty plasma

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-399-Pr5-402
Author(s):  
V. E. Fortov ◽  
A. P. Nefedov ◽  
V. A. Sinel'shchikov ◽  
A. V. Zobnin ◽  
A. D. Usachev
Keyword(s):  
Dusty Plasma ◽  
Inductively Coupled

Quasigravitation in dusty plasma

2001 ◽  
Vol 171 (2) ◽  
pp. 213 ◽  
Author(s):  
Alexander M. Ignatov
Keyword(s):  
Dusty Plasma
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