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Sensitiveness of light absorption for self-focusing at laser–plasma interaction with weakly relativistic and ponderomotive regime

Published online by Cambridge University Press:  17 October 2016

S.D. Patil ,
M.V. Takale ,
V.J. Fulari  and
T.S. Gill
S.D. Patil*
Affiliation:
Department of Physics, Devchand College, Arjunnagar Dist., Kolhapur 591 237, India
M.V. Takale
Affiliation:
Department of Physics, Shivaji University, Kolhapur 416 004, India
V.J. Fulari
Affiliation:
Department of Physics, Shivaji University, Kolhapur 416 004, India
T.S. Gill
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar 143 005, India
*
Address correspondence and reprint requests to: S.D. Patil, Department of Physics, Devchand College, Arjunnagar, Dist., Kolhapur 591 237, India. E-mail: sdpatil_phy@rediffmail.com
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Abstract

In the present paper, we have examined the sensitiveness of light absorption for self-focusing of Gaussian laser beam in plasma. By introducing dielectric function of plasma under ponderomotive and weakly relativistic regime, we have established the differential equation for beam-width parameter by using parabolic equation approach under Wentzel-Kramers-Brillouin and paraxial approximations and solved it numerically. In order to incorporate the sensitiveness of light absorption for self-focusing, behavior of normalized beam-width parameter; plasma density distribution with dimensionless distance of propagation is presented graphically and discussed. Numerical analysis shows that light absorption plays a vital role in self-focusing of laser beam in plasma under weakly relativistic and ponderomotive regime and gives reasonably interesting results.

Keywords

AbsorptionGaussian beamSelf-focusing Relativistic
Type
Research Article
Information
Laser and Particle Beams , Volume 34 , Issue 4 , December 2016 , pp. 669 - 674
Copyright
Copyright © Cambridge University Press 2016 

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