Large amplitude ion-acoustic double layers in a plasma having variable-charge dust grain particles

1997 ◽  
Vol 25 (3) ◽  
pp. 492-498 ◽  
Author(s):  
Y.N. Nejoh
Keyword(s):  
Large Amplitude ◽  
Double Layers ◽  
Variable Charge ◽  
Ion Acoustic ◽  
Ion Acoustic Double Layers ◽  
Dust Grain

Large-amplitude ion-acoustic double layers in multispecies plasma

1990 ◽  
Vol 68 (6) ◽  
pp. 474-478 ◽  
Author(s):  
S. L. Jain ◽  
R. S. Tiwari ◽  
S. R. Sharma
Keyword(s):  
Large Amplitude ◽  
Reductive Perturbation Method ◽  
Negative Ion ◽  
Double Layers ◽  
Ion Acoustic ◽  
Unmagnetized Plasma ◽  
Ion Acoustic Double Layers ◽  
Ion Species ◽  
Ion Impurity ◽  
Positive Ion

We have investigated the effect of second-ion species on the characteristics of a large-amplitude ion-acoustic double layers (IADL) in a collisionless, unmagnetized plasma consisting of hot and cold Maxwellian populations of electrons and two cold-ion species with different masses, concentrations, and charge states. After deriving the criteria for the existence of large-amplitude IADL, we find that the presence of a positive-ion impurity does not modify considerably the characteristics of large-amplitude IADL. However, the presence of a negative-ion impurity changes significantly the characteristics of large-amplitude IADL. We have also presented an analytic discussion of small-amplitude IADL using a reductive perturbation method.

Arbitrary-amplitude rarefactive ion-acoustic double layers in warm multi-fluid plasmas

1988 ◽  
Vol 40 (1) ◽  
pp. 163-178 ◽  
Author(s):  
S. Baboolal ◽  
R. Bharuthram ◽  
M. A. Hellberg
Keyword(s):  
Large Amplitude ◽  
Small Amplitude ◽  
Layer Structure ◽  
Double Layers ◽  
Good Qualitative Agreement ◽  
Double Layer Structure ◽  
Ion Acoustic ◽  
Arbitrary Amplitude ◽  
Ion Acoustic Double Layers ◽  
Ion Species

Large- and small-amplitude rarefactive ion-acoustic double layers have recently been studied in a fluid plasma with double Maxwellian electrons and a single cold ion species. Here the stationary large-amplitude theory is generalized to include two warm ion species. A technique for numerically solving the full nonlinear problem is presented. With it, useful predictions of the effect of ion temperatures and of light-ion contamination on the double-layer structure are made. A generalization to an arbitrary number of similar fluid components is pointed out. The small-amplitude perturbation theory is also extended to such a plasma, and in its restricted regime good qualitative agreement is obtained with the results of the large-amplitude theory.

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