Journal of Fusion Energy

, Volume 32, Issue 3, pp 355–361 | Cite as

Stimulated Brillouin Scattering of Gaussian Laser Beam in Relativistic Plasma

Original Research


This paper presents an investigation of stimulated Brillouin scattering (SBS) of Gaussian laser beam in relativistic plasma. The pump beam interacts with a pre-excited ion-acoustic wave thereby generating a back-scattered wave. In the high intensity laser beam, electron oscillatory velocity becomes comparable to the velocity of light, which modifies the refractive index of plasma due to increase in the electron mass. This modification of refractive index affects the incident laser beam, ion-acoustic wave and back scattered beam. We have set up non-linear differential equations for the beam width parameters of the main beam, ion-acoustic wave, back-scattered wave and derived expression of SBS-reflectivity by taking full non-linear part of the dielectric constant of relativistic plasma with the help of moment theory approach. It is observed from the analysis that focusing of waves greatly affects the SBS reflectivity.


Self-focusing Relativistic plasma Ion-acoustic wave Back-reflectivity 



The authors would like to thank Department of Science and Technology(DST), Government of India for the support of this work.


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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Department of PhysicsNational Institute of Technology JalandharJalandharIndia

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