Jena 2013 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 19: Poster: Theorie und Modellierung

P 19.23: Poster

Donnerstag, 28. Februar 2013, 14:00–16:00, Poster EG

Dielectric wave model for the stratified ionospheric E-layer — •Claudia-Veronika Meister, Henrike Erhard, and Dieter H. H. Hoffmann — Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, 64289 - Darmstadt, Germany

A dielectric model for waves of the Earth’s ionosphere caused by acoustic-type waves is developed. In doing so, in comparison to the well-known dielectric wave model by R.O. Dendy for homogeneous systems, the stratification of the atmosphere is taken into account. Moreover, within the frame of many-fluid magnetohydrodynamics also the momentum transfer between the charged and neutral particles is considered. The acoustic-type waves in the warm, weakly-collisional E-layer are introduced in the magnetohydrodynamic system by a fluctuating neutral-particle component. Models of the altitudinal scales of the plasma parameters and the electromagnetic wave field are derived. In case of the electric wave field, a method is given to calculate the altitudinal scale based on the Poisson equation for the electric field and the magnetohydrodynamic description of the particles. Further, an expression is derived to estimate the temperatur changes in the E-layer because of the propagation of acoustic-type wave modes.