Spherical and spheroidal shells as models in magnetic detection

Author

Frumkis, Lev ; Kaplan, Ben-zion

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

4151

Lastpage

4158

Abstract

The expressions for the scalar potentials of prolate and oblate spheroidal shells immersed in a dc uniform magnetic field are obtained. The expressions for the induced dipole moment of the shells are also evaluated. The problem is solved by finding solutions for the Laplace equation that satisfy boundary conditions at the shell surfaces. The shell thickness effect on the induced dipole moment and on its orientation are evaluated, The results appear to be useful for the analysis and for the prediction of magnetic signatures of hidden ferromagnetic objects belonging to a relatively large family

Keywords

Laplace equations; magnetic field measurement; magnetic moments; magnetometers; object detection; Laplace equation; boundary conditions; dc uniform magnetic field; ferromagnetic objects; induced dipole moment; magnetic detection; magnetic signatures; oblate spheroidal shells; prolate spheroidal shells; scalar potentials; shell surfaces; shell thickness effect; spherical shells; Boundary conditions; Laplace equations; Magnetic analysis; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic moments; Magnetostatics; Object detection; Senior members;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.799062

Filename

799062