Accession Number : ADA195335

Title :   Role of Ordinary to Extraordinary Mode Wave Coupling in Ionospheric Heating Experiments.

Descriptive Note : Final rept. Jul 83-Aug 85,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Abali, B ; Seliga, T A ; Aydin, K

PDF Url : ADA195335

Report Date : Mar 1988

Pagination or Media Count : 147

Abstract : Electromagnetic wave propagation in a plane stratified ionospheric plasma and its possible applications to high power, high frequency (HF) experiments are investigated. A theoretical and computational examination of ordinary to extraordinary mode wave coupling is made. This coupling occurs when the propagation is in the magnetic meridian, near the critical angle of incidence. The importance of the mode coupling phenomenon in ionospheric heating experiments is discussed and demonstrated with numerical full wave solutions of the generalized differential equations governing radiowave propagation in a stratified ionosphere. Computational results indicate that mode coupling leads to intense absorption of radiowave energy near the plasma resonance level. The angular shape of the coupling window, in which the coupling is most effective, is found to be approximately circular with its width being a function of the gradient of the electron density. Keywords: Ionospheric heating; Ordinary mode waves; Extraordinary mode waves; Full wave solution; Mode coupling; Plasma resonance level.

Descriptors :   *ELECTRON DENSITY, *RADIO WAVES, *RADIOFREQUENCY POWER, *HEATING, ABSORPTION, ANGLE OF INCIDENCE, ANGLES, COMPUTATIONS, COUPLING(INTERACTION), DIFFERENTIAL EQUATIONS, ELECTROMAGNETIC WAVE PROPAGATION, ENERGY, HEATING, HIGH FREQUENCY, HIGH POWER, INTENSITY, IONOSPHERE, NUMERICAL ANALYSIS, PLASMAS(PHYSICS), RESONANCE, SHAPE, SOLUTIONS(GENERAL), STRATIFICATION, WINDOWS, HEAT TRANSFER

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE