Spherical and spheroidal shells as models in magnetic detection
Magnetic detection is a widespread technique utilizing the Earth's magnetic field anomaly measurements in geophysics, in submarine detection, in environmental cleanup, and in detection of other hidden objects. 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.
- Research Organization:
- Ben-Gurion Univ. of the Negev, Beer-Sheva (IL)
- OSTI ID:
- 20000588
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Vol. 35, Issue 5Pt3; Other Information: PBD: Sep 1999; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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