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Second and third harmonics generation in the interaction of strongly magnetized dense plasma with an intense laser beam

Published online by Cambridge University Press:  17 April 2012

Mohammad Ghorbanalilu
Mohammad Ghorbanalilu*
Affiliation:
Physics Department, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran; Plasma & Condensed Matter Computational Research Lab, Azarabaijan University of Tabiat Moallem, Tabriz, Iran
*
Address correspondence and reprint requests to: Mohammad Ghorbanalilu, Physics Department, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran. E-mail: mh-alilo@yahoo.com
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Abstract

The goal of this theory is to study the conversion of a fraction of a laser beam to its phase-mismatch second and third harmonics. This conversion takes place by focusing an intense laser beam into a transversely magnetized plasma, as a nonlinear medium. The influence of the polarization field is considered, however, the plasma density is below the critical density. It has already been revealed that for dense plasma, the second and third harmonics efficiencies decreased with density increasing in the presence of a sufficiently strong magnetic field. This result is in contrast to the under dense and weakly magnetized plasma, which the harmonics efficiencies increased with density increasing. It is shown that the harmonics radiation cut-off, when the magnetic field increases up until the saturation strength Bsat. In addition, the results indicated that the average phase-mismatch third harmonic conversion efficiency is a little smaller than the phase-match case reported for non-magnetized plasma.

Keywords

Harmonic generationLaser plasma interactionMagnetized plasma
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 2 , June 2012 , pp. 291 - 298
Copyright
Copyright © Cambridge University Press 2012

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