Abstract
Second order statistical moments of new internal MHD wave in the ionospheric F region are investigated analytically by geometrical optics approximation. Degree of a curvature of a constant phase surface and the variance of an instant frequency measuring by experiment has been obtained for arbitrary correlation function of electron density fluctuations. Energy exchange between the internal wave and turbulent plasma flow is considered calculating the mean energy flux density in the first and second approximations. Numerical calculations are carrying out for both anisotropic Gaussian correlation function and power law-spectrum characterizing elongated plasma irregularities using experimental data of satellites and incoherent scatter radar observations.
Highlights
At present time it was established that statistical characteristics of wave depend on as the correlation features of the variable parameters of a chaotically random medium, as well as on the dispersion and the type of waves
Propagation of MHD waves in the turbulent plasma flow is of great interest in both cosmic and laboratory plasma
Several specific features are arising at MHD wave propagation in the ionospheric plasma with spatial-temporal chaotically varying parameters, energy exchange between the wave and nonstationary medium
Summary
At present time it was established that statistical characteristics of wave depend on as the correlation features of the variable parameters of a chaotically random medium, as well as on the dispersion and the type of waves. The Earth magnetic field in the ionosphere generates small and medium-scale MHD waves: Alfven and magneto-acoustic waves. In the case of low-pressure plasma neglecting thermal velocities and ions motion under the action of the wave field, Jandieri George et al.: Statistical Characteristics of New Type Internal Wave in the Ionospheric F Region if electron density fluctuations are smooth and plasma nonstationarity is caused by turbulent motion, applying geometrical optics method [7] the following conditions are fulfilled: k0 l >> 1, ω0 l >> 1 V0. Where l is characteristic linear scale of electron density irregularities In this case we will neglect transformation of different waves and consider one of the most interesting case when collision frequency between plasma particles is small with respect to the frequency of an incident wave. Several specific features are arising at MHD wave propagation in the ionospheric plasma with spatial-temporal chaotically varying parameters, energy exchange between the wave and nonstationary medium
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