Numerical simulation to study transient self-focusing and gigahertz acoustic generation in collisional plasma

This paper presents the study of a coupled system of equations for a laser beam and an ion acoustic wave (IAW) in a collisional plasma through numerical simulation. The pump beam has been perturbed by a periodic perturbation that leads to the nonlinear evolution of the laser beam. The filamentation...

Full description

Saved in:
Bibliographic Details
Published in:Physics of plasmas 2017-05, Vol.24 (5)
Main Authors: Hussain, Saba, Sharma, Swati, Singh, Ram Kishor, Uma, R., Sharma, R. P.
Format: Article
Language:English
Subjects:
Collisional plasmas
Computer simulation
Ion acoustic waves
Laser beams
Lasers
Mathematical models
Periodic variations
Plasma physics
Simulation
Time dependence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents the study of a coupled system of equations for a laser beam and an ion acoustic wave (IAW) in a collisional plasma through numerical simulation. The pump beam has been perturbed by a periodic perturbation that leads to the nonlinear evolution of the laser beam. The filamentation of the laser beam has been found to change appreciably with varying perturbation number. It was observed that the frequency spectra of the IAW lie in the gigahertz (GHz) domain. For the sake of better understanding of the physical process involved, a simplified model has been developed. The model contains spatial harmonics (obtained through simulation) at different times, by which the time dependent localization of the beam has been investigated.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4981936