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Impact of The High-Energy Product Materials on Magnetic Circuit Design

Published online by Cambridge University Press:  25 February 2011

Herbert A. Leupold ,
Ernest Potenziani II ,
John P. Clarke  and
Douglas J. Basarab
Herbert A. Leupold
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
Ernest Potenziani II
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
John P. Clarke
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
Douglas J. Basarab
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
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Abstract

Many devices that employ magnetic fields are encumbered by massive solenoids with their equally bulky power supplies or by inefficient permanent-magnet structures designed for use with obsolescent magnet materials. This paper describes how the high-energy product materials are employed in several structures to afford mass and bulk reductions of an order of magnitude or more. Also discussed are novel designs that are not attainable with the older materials such as the alnicos. Substitution of solenoids with permanent magnets also eliminates considerable energy consumption and the attendant problems arising from generation of heat. In many cases, all this is accomplished within leakage-free systems. Among the designs described are: nuclear magnetic resonance imagers; cylindrical solenoidal field structures for klystrons and nonperiodic field TWT's; cylindrical field structures with arbitrary axial gradients for advanced gyrating beam sources; annular field sources for high harmonic gyrotrons; helical transverse field sources for circularly polarized radiation sources; miniature periodic permanent-magnet configurations; and clad permanent-magnet circuits for biasing fields in millimeter-wave filters. Where alternate designs exist, they are compared with regard to performance, bulk, and economy. All of the structures are in various stages of design and construction, and, for completed structures, comparisons are made between theoretical projections and actual performance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 96: Symposium F – High Performance Permanent Magnet Materials , 1987 , 279
Copyright
Copyright © Materials Research Society 1987

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References

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