High-field permanent-magnet structures

Details High-field permanent-magnet structures High-field permanent-magnet structures

1988-05-27

1989-08-29

Harris, George

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

335216, 335306, 315535, H01F 702, H01F 722

Patent

active

048617520

ABSTRACT:
An azimuthally circumscribed section of a hollow hemispherical magnetic flux source (i.e., a quarter-spherical or one eighth-spherical structure) has a superconducting planar sheet abutting one flat face of the section and, at least, a second planar sheet of selected material (e.g., paramagnetic or diamagnetic) abutting another flat face of the section and perpendicular to the first sheet. The magnetic "mirror" image of the magnetic section in the diamagnetic (superconductor) plane and the virtual (anti-mirror and/or mirror) image(s) in the other perpendicular plane(s) makes the central cavity appear (magnetically) exactly as if a complete "magic sphere" were its source. The central or working cavity is readily accessible through a hole in the first or second planar sheet.

REFERENCES:
patent: 2952803 (1960-09-01), Charles et al.
patent: 3768054 (1973-10-01), Neugebauer
patent: 4392078 (1983-07-01), Noble et al.
patent: 4429229 (1984-01-01), Gluckstern
patent: 4614930 (1986-09-01), Hickey et al.
"Proceedings of the Eighth International Workshop on Rare Cobalt Permanent agnets", by Klaus Halbach (Univ. Dayton, Dayton OH, 1985), pp. 123-136.

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