Nonlinear Steepening of Density Profile by Intense Laser Radiation in Collisional Inhomogeneous Plasmas

Autor:	Ali Reza Niknam, Mohammad Reza Jafari Milani, B. Bokaei, M. Hashemzadeh
Rok vydání:	2014
Předmět:	Physics Permittivity Nuclear and High Energy Physics Wavelength Electron density Physics::Optics Relative permittivity Electron temperature Electromagnetic electron wave Plasma Atomic physics Condensed Matter Physics Electromagnetic radiation
Zdroj:	IEEE Transactions on Plasma Science. 42:1353-1357
ISSN:	1939-9375 0093-3813
DOI:	10.1109/tps.2014.2312337
Popis:	The interaction between a high-power electromagnetic wave with an inhomogeneous underdense plasma is studied by considering the ohmic heating caused by laser radiation. Considering the plasma inhomogeneity and ohmic heating, the nonlinear dielectric permittivity is obtained in the collisional regimes. The wave equation is numerically solved and the electromagnetic fields, electron density, electron temperature, and dielectric permittivity profiles are achieved. These profiles show that in the presence of three density profiles, by increasing the laser energy flux, the modified electron density deviates from background electron density and its structure near the critical density becomes highly peaked. Finally, it is found that the amplitude of electron density distribution decreases by increasing the laser wavelength.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::298c203fa1f287b039ddaf92fbf76766 https://doi.org/10.1109/tps.2014.2312337 Zobrazit plný text záznamu