Skip to main content Accessibility help
×
Home

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

  • Herbert A. Leupold (a1), Ernest Potenziani (a1), John P. Clarke (a1) and Douglas J. Basarab (a1)

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.

Copyright

References

Hide All
1 Roters, H. C., Electromagnetic Devices, Chapters 4 & 5, (Wiley, New York, (1941).
2 Parker, R. J. and Studders, R. J., Permanent Magnets and Their Application, Chapters 4 & 5, (Wiley, New York, London, 1962).
3 Leupold, H. A., in Proceedings of the Fifth International Workshop on Rare-Earth-Cobalt Permanent Magnets and Their Applications, Roanoke, VA, June 7–10 1981, p. 270.
4 Leupold, H. A., “A Magnetic Design Primer,” Part V, summer short course, Modern Permanent Magnets, Applications and Design, May 19–23, 1986, p. 140.
5 Neugebauer, W. and Branch, E. M., “Applications of Cobalt Samarium Magnets to Microwave Tubes,” Technical Report, Microwave Tube Operation, General Electric (15 March 1972).
6 Rothwarf, F., Leupold, H. A. and Jasper, L. J. Jr., Proc. of the Third International Workshop on Rare-Earth Magnets and Their Applications, p. 255, Ed. K. J. Strnat (1978).
7 Tauber, A., Leupold, H. A. and Rothwarf, F., Proc. of the Eighth International Workshop on Rare Earth Magnets and Their Applications, p. 103 K. J. Strnat (1985).
8 Clarke, J. P. and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1063 (1986).
9 Potenziani, E. II and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1078 (1986).
10 Furuno, D. S., McDermott, D. B., and Luhmann, N. C. Jr., Proceedings of IEDM, p. 346, Los Angeles, CA, December 7–10 1986.
11 McDermott, D. B., Luhmann, N. C. Jr., Furuno, D. S., Kupiszewski, A., and Jory, H. R., Int. J. I. R. and Millimeter Waves 4, 639 (1983).
12 Dionne, N. J., Proceedings of IEDM, p. 513, Los Angeles, CA, Dec. 7–10, (1986).
13 Clarke, J. P., Potenziani, E. II, and Leupold, H. A., 31st Annual Conference on Magnetism and Magnetic Materials, Paper BP-17, Baltimore, MD, Nov. 17–20 (1986). (To be published in J. A. P.)
14 Battacletti, J. H. and Knox, T. A., IEEE Trans. Magn., MAG 21 (5), 1874 (1985).
15 Leupold, H. A., Clarke, J. P., Lockwood, W. E., and Meyers, D. J., Proceedings of IEDM, p. 693, Los Angeles, CA, Dec. 7–10 (1986).
16 Leupold, H. A. and Clarke, J. P., submitted for publication in Electron Devices Society Transactions; Part II, Vacuum Electron Devices.
17 Halbach, Klaus, Proceedings of the Eighth International Workshop on Rare-Earth Magnets and their Applications, p. 128, Dayton, OH, May 1985.
18 Morcos, A. B. C., University of Dayton, School of Engineering, M.S. Thesis, November, 1985.
19 Leupold, H. A. and Potenziani, E. II, Intermag Paper GH-12, Tokyo, Japan, April 14–17, 1987.
20 Leupold, H. A. and Potenziani, E., IEEE Trans., Magnetics, (to appear September, 1987).
21 Phillips, R. M., IRE ED–7, p. 231 (1960).
22 Jackson, R. H. and Pershing, D. E., Proceedings of IEDM, p. 86, Los Angeles, CA, Dec. 7–10, 1986.
23 Morcos, A. B. C., Potenziani, E. II, and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1066, 1986.

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

  • Herbert A. Leupold (a1), Ernest Potenziani (a1), John P. Clarke (a1) and Douglas J. Basarab (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed