Effect of ripple on self-focusing of a cosh-Gaussian laser beam in collisionless plasma

Frontiers of Physics and Plasma Science

Jena, Karishma^1 ; Vyas, Bharat^2 ; Sharma, Prerana^1

Physics Department, Ujjain Engineering College, Ujjain, M.P.

456010, India^1

School of Excellence, Ujjain M.P.

456010, India^2

关键词: Approximation methods;    Brillouin;    Cosh-Gaussian beams;    Cosh-Gaussian laser beams;    Critical power;    Eikonal method;    Paraxial;    Self-focusing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/836/1/012030/pdf
DOI  :  10.1088/1742-6596/836/1/012030

来源: IOP

【 摘 要 】

In this paper, the effect of presence of ripple on the cosh-Gaussian beam in collisionless plasma considering relativistic nonlinearity is investigated. Using the Wentzel Kramers Brillouin (WKB) paraxial-ray approximation method and eikonal method, the basic sets of equations has been derived. It is observed that when the initial power of the ripple is greater than the critical power for self-focusing of cosh-Gaussian beam the ripple gets focused over the beam.