TITLE

Resonant second harmonic generation of a Gaussian electromagnetic beam in a collisional magnetoplasma

AUTHOR(S)
Kaur, Sukhdeep; Sharma, A. K.; Salih, Hyder A.
PUB. DATE
April 2009
SOURCE
Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p042509
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Second harmonic generation of a right circularly polarized Gaussian electromagnetic beam in a magnetized plasma is investigated. The beam causes Ohmic heating of electrons and subsequent redistribution of the plasma, leading to self-defocusing. The radial density gradient, in conjunction with the oscillatory electron velocity, produces density oscillation at the wave frequency. The density oscillation beats with the oscillatory velocity to produce second harmonic current density, giving rise to resonant second harmonic radiation when the wave frequency is one-third of electron cyclotron frequency. The second harmonic field has azimuthal dependence as exp(iθ). The self-defocusing causes a reduction in the efficiency of harmonic generation.
ACCESSION #
38611539

 

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