Resonant second harmonic generation of a Gaussian electromagnetic beam in a collisional magnetoplasma
- Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110016 (India)
- Department of Applied Sciences, University of Baghdad, Baghdad (Iraq)
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(i{theta}). The self-defocusing causes a reduction in the efficiency of harmonic generation.
- OSTI ID:
- 21277007
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of laser self-defocusing on third harmonic generation in a tunnel ionizing gas
Second harmonic generation of q-Gaussian laser beam in preformed collisional plasma channel with nonlinear absorption