Sheared-flow-driven ion-acoustic drift-wave instability and the formation of quadrupolar vortices in a nonuniform electron–positron–ion magnetoplasma

2004 ◽  
Vol 11 (9) ◽  
pp. 4341-4345 ◽  
Author(s):  
Arshad M. Mirza ◽  
M. Azeem
Keyword(s):  
Wave Instability ◽  
Sheared Flow ◽  
Drift Wave ◽  
Electron Positron ◽  
Ion Acoustic

Drift wave instability in a radially bounded dusty magnetoplasma with parallel ion velocity shear

2012 ◽  
Vol 79 (1) ◽  
pp. 33-35
Author(s):  
P. K. SHUKLA ◽  
M. ROSENBERG
Keyword(s):  
Wave Equation ◽  
Fluid Model ◽  
Low Frequency ◽  
Velocity Shear ◽  
Charged Dust ◽  
Wave Instability ◽  
Linear Dispersion ◽  
Drift Wave ◽  
Ion Acoustic ◽  
Two Fluid Model

AbstractProperties of the coupled dust ion-acoustic drift wave instability in a radially bounded dusty magnetoplasma with an equilibrium sheared parallel ion (SPI) flow are investigated. By using the two-fluid model for the electrons and ions, a wave equation for the low-frequency coupled dust ion-acoustic drift waves in a bounded plasma with stationary charged dust grains is derived. The wave equation admits a linear dispersion relation, which exhibits that the radial boundary affects the growth rate of the coupled ion-acoustic drift wave instability which is excited by the SPI flow. The results should be relevant to dusty magnetoplasma experiments with an SPI flow.

Ion acoustic and drift wave vortices in electron–positron–ion plasmas

2003 ◽  
Vol 10 (9) ◽  
pp. 3793-3795 ◽  
Author(s):  
Q. Haque ◽  
H. Saleem
Keyword(s):  
Drift Wave ◽  
Electron Positron ◽  
Ion Acoustic

scholarly journals Effects of Positron Density and Temperature on Large Amplitude Ion-acoustic Waves in an Electron - Positron - Ion Plasma

1997 ◽  
Vol 50 (2) ◽  
pp. 309 ◽  
Author(s):  
Y. N. Nejoh
Keyword(s):  
Acoustic Waves ◽  
Large Amplitude ◽  
Density Ratio ◽  
Present Theory ◽  
Electron Mass ◽  
Mass Ratio ◽  
Ion Acoustic Waves ◽  
Ion Plasma ◽  
Electron Positron ◽  
Ion Acoustic

The nonlinear wave structures of large amplitude ion-acoustic waves are studied in a plasma with positrons. We have presented the region of existence of the ion-acoustic waves by analysing the structure of the pseudopotential. The region of existence sensitively depends on the positron to electron density ratio, the ion to electron mass ratio and the positron to electron temperature ratio. It is shown that the maximum Mach number increases as the positron temperature increases and the region of existence of the ion-acoustic waves spreads as the positron temperature increases. The present theory is applicable to analyse large amplitude ion-acoustic waves associated with positrons which may occur in space plasmas.

Dissipative drift wave instability in a radially bounded nonuniform dusty magnetoplasma

2012 ◽  
Vol 376 (12-13) ◽  
pp. 1129-1131 ◽  
Author(s):  
P.K. Shukla ◽  
M. Rosenberg
Keyword(s):  
Wave Instability ◽  
Drift Wave
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