Accession Number:

AD0291918

Title:

DIFFRACTION BY A PERFECTLY CONDUCTING SEMI-INFINITE SCREEN IN AN ANISOTROPIC PLASMA

Descriptive Note:

Corporate Author:

HARVARD UNIV CAMBRIDGE MASS CRUFT LAB

Personal Author(s):

Report Date:

1962-10-15

Pagination or Media Count:

1.0

Abstract:

The scattering of a plane electromagnetic wave by a perfectly conducting semi-infinite screen embedded in a homogeneous plasma is investigated. A uniform magnetic field is assumed to be impressed externally in a direction parallel to the edge of the half-plane. The plasma is idealized by a dielectric characterized by a tensor dielectric constant. The direction of the incident wave is assumed to be in a plane perpendicular to that of the screen. This vector problem is separable into two equivalent scalar problems for which either the electric or the magnetic vector is parallel to the edge of the half-plane. It is found that for the case of the E-mode, the magnetic vector parallel to the edge of the halfplane satisfies a simple wave-equation and a new type of impedance boundary condition on the screen. This problem is formulated in terms of an integral equation which specifies the current induced on the screen. The integral equation is of the Wiener-Hopf type and is solved by the usual function-theoretic methods. A surface wave is found to exist for one orientation of the external magnetic field and the characteristics of this surface wave are determined. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE