
TY  - JOUR
A1  - Das, GC 
A1  - lbohanbi Singh, Kh 
T1  - Soliton Characteristics at the Critical Density of Negative Ions in Ion-beam Plasmas
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1990
VL  - 43
IS  - 3
SP  - 319
EP  - 332
KW  - 
UR  - https://doi.org/10.1071/PH900319 
N2  - By using the reductive perturbation technique, ion-acoustic waves are studied in a generalised multicomponent plasma. The multiple ions modify drastically the characteristics of the solitary waves. In particular, the negative ions have a critical density at which the nonlinearity of the Korteweg-deVries (K-dV) equation vanishes and the ion-acoustic solitary wave is seen to be described by a modified K-dV (mK-dV) equation. Using higher order nonlinearities, the non-uniform transition of the K-dV equation to the mK-dV equation along with the conservation of the Sagdeev potential is described. Theoretical observations on the existence of the solitary waves, as expected, could be of interest in laboratory plasmas 
ER  -

