Propagation of electromagnetically generated wake fields in inhomogeneous magnetized plasmas

Details Propagation of electromagnetically generated wake fields in inhomogeneous magnetized plasmas Propagation of electromagnetically generated wake fields in inhomogeneous magnetized plasmas

2001-11-06

arxiv.org/abs/physics/0111015v1

Physics

Plasma Physics

12 pages in LaTeX style, 11 eps figures

Scientific paper

10.1017/S0022377802001708

Generation of wake fields by a short electromagnetic pulse in a plasma with an inhomogeneous background magnetic field and density profile is considered, and a wave equation is derived. Transmission and reflection coefficients are calculated in a medium with sharp discontinuities. Particular attention is focused on examples where the longitudinal part of the electromagnetic field is amplified for the transmitted wave. Furthermore, it is noted that the wake field can propagate out of the plasma and thereby provide information about the electron density profile. A method for reconstructing the background density profile from a measured wake field spectrum is proposed and a numerical example is given.

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