Abstract
Lidar is considered as an electron energy detector of ionosphere precipitations, and the cleaning of radiation belts is like the energy pumping of the ionosphere layer. The excitation efficiency of ionosphere plasma components by precipitations and the features of resonant backscattering of laser radiation in the active ionosphere are discussed. It is shown that in the quantum system in which the lidar plays the role of a master oscillator and the ionosphere layer of the amplifier, different modes of nonlinear oscillations are possible depending on the intensity of the precipitation. Analogies are being made with other natural nonlinear systems.
Highlights
Resonant propagation and back scattering of lidar signals in the exited ionosphere is the example of nature laser system where the lidar is used as master oscillator and the electron precipitations as the energy pumping of ionosphere layers which play the role of spatial distributed resonators and reflectors
We will consider lidar sounding in flicker aurora which is induced by electron precipitations from mid-latitude radiation belts (Kamchatka region)
Lidar may be used as a detector of electron energy spectrums
Summary
Resonant propagation and back scattering of lidar signals in the exited ionosphere is the example of nature laser system where the lidar is used as master oscillator and the electron precipitations as the energy pumping of ionosphere layers which play the role of spatial distributed resonators and reflectors. The lidar signal is an indicator of the radiation belts cleaning and the ionosphere energy pumping by the charge particle flux which creates the non equilibrium ionosphere layer at 200-600 km of altitudes. It will be shown what is the effective reflector in the non equilibrium ionosphere layer
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