Ion acoustic solitons and supersolitons in a magnetized plasma with nonthermal hot electrons and Boltzmann cool electrons

2014 ◽  
Vol 21 (8) ◽  
pp. 082304 ◽  
Author(s):  
O. R. Rufai ◽  
R. Bharuthram ◽  
S. V. Singh ◽  
G. S. Lakhina
Keyword(s):  
Magnetized Plasma ◽  
Hot Electrons ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons

Negative ion-acoustic solitons in a two-component magnetized plasma

1988 ◽  
Vol 31 (6) ◽  
pp. 1549 ◽  
Author(s):  
L. T. Song ◽  
L. C. Lee ◽  
L. Huang
Keyword(s):  
Magnetized Plasma ◽  
Negative Ion ◽  
Two Component ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons

Obliquely propagating ion-acoustic solitons in a multi-component magnetized plasma with negative ions

1994 ◽  
Vol 52 (3) ◽  
pp. 409-429 ◽  
Author(s):  
M. K. Mishra ◽  
R. S. Chhabra ◽  
S. R. Sharma
Keyword(s):  
Soliton Solution ◽  
Kdv Equation ◽  
Critical Concentration ◽  
Negative Ions ◽  
Magnetized Plasma ◽  
Negative Ion ◽  
Fast Mode ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons ◽  
Ion Species

Oblique propagation of ion-acoustic solitons in a magnetized low-β plasma consisting of warm positive and negative ion species along with hot electrons is studied. Using the reductive perturbation method, a KdV equation is derived for the system, which admits an obliquely propagating soliton solution. It is found that if the ions have finite temperatures then there exist two types of modes, namely slow and fast ion-acoustic modes. The parameter determining the nature of soliton (i.e. whether the system will support compressive or rarefactive solitons) is different for slow and fast modes. For the slow mode the parameter is the relative temperature of the two ion species, whereas for the fast mode it is the relative concentraion of the two ion species. For the fast mode it is found that there is a critical value of the negative-ion concentration below which only compressive solitons exist and above which rarefactive solitons exist. To discuss the soliton solution at the critical concentration, a modified KdV equation is derived. It is found that at the critical concentration of negative ions compressive and rarefactive solitons co-exist. The effects of temperature of different ion species, angle of obliqueness and magnetization on the characteristics of the solitons are discussed in detail.

Ion-acoustic solitons in magnetized multi-component plasmas including negative ions

1989 ◽  
Vol 41 (1) ◽  
pp. 139-155 ◽  
Author(s):  
K. P. Das ◽  
Frank Verheest
Keyword(s):  
Kdv Equation ◽  
Nonlinear Coefficient ◽  
Perturbation Expansion ◽  
Negative Ions ◽  
Magnetized Plasma ◽  
Three Dimensions ◽  
Negative Ion ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons ◽  
Ion Species

A study is made of ion-acoustic solitons in a low-β magnetized plasma consisting of any number of adiabatic positive and negative ion species in addition to the presence of isothermal electrons. A KdV equation in three dimensions or KdV-ZK equation is derived. This equation admits comprehensive or rarefactive solitons propagating in any oblique direction with respect to the direction of the external magnetic field, depending on the density of the negative ion species. When the nonlinear coefficient of this equation vanishes, the nonlinear ion-acoustic wave is described by a modified KdV equation in three dimensions. This equation is also derived and its solitary-wave solutions are discussed. Both compressive and rarefactive solitons are possible. Finally, the three-dimensional stability of these solitons is investigated by the small-k perturbation expansion method of Rowlands and Infeld. Stability criteria and growth rates of instabilities are derived.

Ion-acoustic solitons in a magnetized plasma with nonthermal electrons

1996 ◽  
Vol T63 ◽  
pp. 80-86 ◽  
Author(s):  
R A Cairns ◽  
A A Mamun ◽  
R Bingham ◽  
P K Shukla
Keyword(s):  
Magnetized Plasma ◽  
Nonthermal Electrons ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons
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