RADAR SCATTERING FROM NEAR-OVERDENSE AND OVERDENSE RANDOM, PLANE PARALLEL PLASMA SLABS.
Abstract
The method developed by the authors for calculating the electromagnetic scattering from a random, plane parallel plasma slab is extended to the near-overdense omega sub p approximately equals omega and overdense regimes omega sub p > omega. The mean reflection, absorption and transmission coefficients for an ensemble of random plasma slabs, as well as the incoherent reflected power, are calculated. The contribution, <R'>, to the mean energy reflection coefficient due to the electron density fluctuations is compared with the result obtained analytically using a perturbation expansion of the wave equation. The method correctly predicts the slope of the curve of <R'> versus the mean square electron density fluctuation, zeta squared, as the latter approaches zero. Under certain near-overdense and overdense conditions it is found that <R'> is negative (of course the incoherent reflected power remains positive); the perturbation expansion method correctly predicts the slope of the <R'> versus zeta squared curve for small zeta in these cases, also. In addition to the method of expanding the wave equation directly in a perturbation series, other similar methods are discussed and applied to the one dimensional plasma slab. Also, the first and second order Born approximations are outlined and compared to the foregoing. A brief review of some previous applications of these methods is given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0675933
Entities
People
- Adolf R. Hochstim
- Charles P. Martens
Organizations
- Institute for Defense Analyses