Kinetic analysis of electromagnetic wave backscattering in a magnetized plasma

Abstract

An analysis is presented which describes the stimulated backscattering of an electromagnetic wave with frequency large compared with the electron cyclotron frequency and the electrostacic scatterer wave frequency. The electron and ion susceptibilities provided by kinetic theory are employed in convenient approximations valid at moderate temperatures. Formulae are derived which permit calculation of the growth rate and threshold in bounded and unbounded plasmas. A numerical study of the effects of a static magnetic field on the stimulated backscattering of a carbon dioxide laser beam in a hydrogen plasma is included.

Stimulated scattering of electromagnetic waves by magnetosonic modes in a plasma

“…The theory leading to (1) has also been generalized to include various aspects on wave propagation in magnetized plasmas (e.g. Yu, Shukla & Spatschek 1974;Bujarbarua, Sen & Kaw 1974, 1976Manheimer & Ott 1974;Lee 1975;Larsson & Stenflo 1976;Yu & Shukla 1976;Kaw 1976;Stenflo & Larsson 1977;Karttunen & Salomaa 1977;Johnston, Kaufman & Johnston 1978;Grebogi & Liu 1980;Stenflo 1981;Chou & Tsai 1981;Willett & Bilikmen 1981;Rahman et al 1981;96 L. Stenflo Shivamoggi 1982;Papadopoulos, Sharma & Tripathi 1982;Lee & Kuo 1983;Saxena 1983;Barr et al 1984;Shukla, Yu & El-Nadi 1984;Murtaza & Shukla 1984;Kasymov et al 1985) with applications to the heating of magnetically confined plasmas (e.g. Porkolab 1978) as well as to ionospheric heating problems (e.g.…”

Scattering and Filamentation of Electromagnetic Waves by kinetic Drift-Alfvén Waves

“…Therefore, the electrons acheve equilibrium by moving along the magnetic field lines. Neglecting inertia terms as w k,vhe, w , , from the 2-component of the momentum equation for electrons, we obtain (9) where U,* = -kyKV&,/w, and vhe = (T,/&)"*. By combining equation of continuity and the perpendicular component of the momentum equation for electrons, in the approximations k?v&,/wL < 1, uk,v&e/wL < 1 and U,, 3w;, w , we obtain an expression for V, as It is worth mentioning here that the nonlinear contribution to n comes mainly from the parallel component of the ponderomotive force F,, while that to V, comes from both parallel and perpendicular components of F,.…”