Simulation studies of processes associated with stimulated electromagnetic emission (SEE) in the ionosphere

Details Simulation studies of processes associated with stimulated electromagnetic emission (SEE) in the ionosphere Simulation studies of processes associated with stimulated electromagnetic emission (SEE) in the ionosphere

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jastp..59.2373s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, v. 59, p. 2373-2381.

Physics

1

Scientific paper

Results of numerical simulation studies of processes associated with Stimulated Electromagnetic Emission (SEE) produced during ionospheric heating experiments are presented. A one-dimensional magnetized electrostatic Particle-In-Cell (PIC) simulation model with uniform plasma density is used to investigate electrostatic wave generation in the region where the pump frequency ω0 approximately equals the upper hybrid frequency ωuh. In particular, the simulation plasma is driven with a uniform oscillating electric field to represent the long wavelength pump wave and power spectra of the electrostatic waves produced are taken. The pump wave frequency and amplitude are varied to consider the effects on the simulation power spectrum. The upper hybrid frequency in the model is varied through harmonics of the electron cyclotron frequency Ωce to consider the effects of stepping the pump frequency through cyclotron harmonics. The power spectrum from the simulation plasma is richly structured. The resulting power spectra show sidebands upshifted and downshifted from the pump frequency by multiples of the lower hybrid frequency ω1h. The structure of the spectrum is highly sensitive to the proximity of the upper hybrid frequency to the cyclotron harmonic frequencies.

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