Relativistic effects on propagation of q-Gaussian laser beam in a rippled density plasma: Application of higher order corrections. (30th July 2018)

• Record Type: Journal Article
• Authors: Kaur, M.; Agarwal, P. C.; Kaur, S.; Gill, T. S.
• Is Part Of: Laser and particle beams. Volume 36:Number 2(2018)
• Page Start: 246
• Page End: 253
• Publication Date: 2018-07-30
• Subjects: Density ripple, -- q-Gaussian laser beam, -- Relativistic nonlinearity, -- Self-focusing; Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S0263034618000228
• Languages: English
• ISSNs: 0263-0346

Abstract

Abstract: A nonparaxial investigation for propagation characteristics of q-Gaussian laser beam in rippled density plasma is studied by considering the relativistic nonlinearity. The field distribution in the medium is expressed in terms of q parameter and beam width parameter f. Nonlinear parabolic partial differential equation governing the evolution of complex envelope in slowly varying approximation is solved in a modulated density profile. Analytical theory of self-focusing including higher order terms in the expansion of dielectric function up to fourth order is developed and the variation of beam width parameter f with the distance of propagation for different parameters is studied. One may note that increased value of density ripple, laser intensity and depth of modulation, increases self-focusing whereas a lower value of q shows strong self-focusing. A comparative study between paraxial and nonparaxial study has also conducted. This study is useful for research in high energy density physics.