Bulg. J. Phys. vol.38 no.2 (2011), pp. 164-174

Conversion of Ion-acoustic Waves into Electromagnetic Waves in Presence of Density Gradient in Ionosphere and Solar Corona

S.N. Paul1, S. Maity2, B. Paul1, R. Bandyopadhyay2, B. Ghosh1
1Department of Physics, Jadavpur University, Kolkata-700 032, India
2Department of Mathematics, Jadavpur University, Kolkata-700 032, India
Abstract. Theoretical investigations have been made regarding the conversion of longitudinal ion-acoustic waves into transverse electromagnetic radiation due to coupling phenomenon in inhomogeneous plasmas. Coupling equations of ion-acoustic and electromagnetic waves, expressions for the Poynting flux of the radiating electromagnetic waves and the mode conversion ratio have been derived. Numerical estimations of the mode conversion efficiency and the radiating Poynting flux have been made for typical F region ionospheric and solar coronal plasmas. The importance of the result is also discussed.

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