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Nonlinear Interaction of a Right-Handed Circularly Polarized Gaussian Electromagnetic Beam with an Electron-Plasma Wave: Generation of Ion-Acoustic Wave

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3 Author(s)

This paper presents an investigation of the nonlinear interaction of a high-power right-handed circularly polarized Gaussian electromagnetic beam with an electron-plasma wave in a hot collisionless magnetoplasma. Because of the nonuniform intensity distribution of the electromagnetic beam, in a plane transverse to the direction of propagation, the ponderomotive force becomes finite and leads to the modification in the background carrier density. This leads to the nonlinear coupling between the electromagnetic beam and the electron-plasma wave. Consequently, the focusing of the electron-plasma wave may take place, leading to the enhancement in its amplitude. The excited electron-plasma wave may again interact with the electromagnetic beam and generate an ion-acoustic wave of appreciable power. The power of the generated ion-acoustic wave increases as we approach the critical density region.

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Plasma Science, IEEE Transactions on  (Volume:12 ,  Issue: 2 )