AN INTRODUCTORY THEORETICAL STUDY OF CONSTANT PERMEABILITY MAGNETIC SHIELDING.
Abstract
Some basic concepts of the constant permeability magnetic shielding problem are examined, and useful mathematical expressions for the static magnetic shielding factor, which follow as a natural consequence of the application of Ampere's law to spherically symmetric, isotropic magnetic shells are developed. The magnetic shielding factor is the ratio of the external unperturbed magnetic field (i.e., measured in the absence of the shield) to the shield's internal field. The development is initially carried out for a single-shell shield and then extended to trilamellar shielding, which is usually more efficient for a given amount of magnetic material. Particular values of shielding factors are calculated for single- and double-shell shields for low permeability magnetic material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 23, 1965
- Accession Number
- AD0624312
Entities
People
- Ronald P. Lepping
Organizations
- Naval Air Warfare Center Warminster