Modulational instability of ion acoustic waves in a magnetised plasma

1982 ◽  
Vol 24 (5) ◽  
pp. 451-456 ◽  
Author(s):  
G Murtaza ◽  
M Salahuddin
Keyword(s):  
Acoustic Waves ◽  
Modulational Instability ◽  
Ion Acoustic Waves ◽  
Ion Acoustic

Nonlinear interaction of slow Alfvén wave with ion acoustic wave and applications to space plasma

2013 ◽  
Vol 79 (5) ◽  
pp. 833-836 ◽  
Author(s):  
B. K. DAS ◽  
R. P. SHARMA ◽  
N. YADAV
Keyword(s):  
Acoustic Waves ◽  
Analytical Study ◽  
Pump Wave ◽  
Modulational Instability ◽  
Solar Wind Plasma ◽  
Alfven Wave ◽  
Ion Acoustic Waves ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Model Equations

AbstractThe paper is concerned with the analytical study of nonlinear coupling of slow Alfvén wave (SW) with ion acoustic waves (IAWs) in high-β and low-β plasmas. Here the pump wave (SW) number density gets perturbed in the presence of IAW. The model equations of IAW and SW turn out to be the modified Zakharov system of equations when the ponderomotive nonlinearities are incorporated in the IAW and SW dynamics. Growth rate of modulational instability has been calculated. The relevance of these investigations for solar wind plasma and solar coronal plasma has also been discussed.

Modulational stability of ion-acoustic waves using Karpman's method

1985 ◽  
Vol 63 (4) ◽  
pp. 435-436
Author(s):  
Bhimsen K. Shivamoggi
Keyword(s):  
Acoustic Waves ◽  
Modulational Instability ◽  
Ion Acoustic Waves ◽  
Langmuir Waves ◽  
Plasma Motion ◽  
Ion Acoustic ◽  
Modulational Stability

Karpman's method is explored for the modulational instability of ion-acoustic waves on interaction with a slow plasma motion. The latter are found to be modulationally stable, unlike the Langmuir waves.

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