Weakly relativistic and ponderomotive effects in interaction of intense laser beam with inhomogeneous collisionless and collisional plasmas

In this work, the effects of the plasma inhomogeneity and weakly relativistic ponderomotive force due to intense laser radiation on the density profile steepening and dielectric permittivity of plasma are studied in collisionless and collisional regimes. The nonlinear wave equation in the plasma is...

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Bibliographic Details
Published in:Waves in random and complex media 2014-01, Vol.24 (1), p.1-18
Main Authors: Niknam, A.R., Jafari Milani, M.R., Bokaei, B., Hashemzadeh, M.
Format: Article
Language:English
Subjects:
Complex media
Density
Dielectric constant
Dielectric strength
Electromagnetic fields
Electron density
Lasers
Permittivity
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Summary:In this work, the effects of the plasma inhomogeneity and weakly relativistic ponderomotive force due to intense laser radiation on the density profile steepening and dielectric permittivity of plasma are studied in collisionless and collisional regimes. The nonlinear wave equation in the plasma is numerically solved and the electromagnetic field profiles, electron density distribution, and dielectric permittivity variations are achieved in two aforementioned regimes. It is shown that the density profile steepening depends significantly on the laser energy flux and its structure near the critical density becomes highly peaked. The electron temperature distribution in collisional regime is also obtained.
ISSN:1745-5030
1745-5049
DOI:10.1080/17455030.2013.858848