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High Field Magnet Using High Critical Temperature Oxide Superconductors

IP.com Disclosure Number: IPCOM000037070D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 3 page(s) / 49K

Publishing Venue

IBM

Related People

Chance, DA: AUTHOR [+5]

Abstract

While providing the potential for high operating temperature, oxide superconductors have low strain tolerance and have not been fabricated in the form of flexible conductors. A technique is described which allows configurations of these materials, fabricated by extensions of conventional ceramic techniques, to be incorporated into a high field magnet.

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High Field Magnet Using High Critical Temperature Oxide Superconductors

While providing the potential for high operating temperature, oxide superconductors have low strain tolerance and have not been fabricated in the form of flexible conductors. A technique is described which allows configurations of these materials, fabricated by extensions of conventional ceramic techniques, to be incorporated into a high field magnet.

The coil configuration consists of a stack of flat plates of a suitable strong, ductile metal compatible with the ceramic fabrication process. The plates are usually circular with a hole in the center which will form the bore of the magnet. A multiplicity of fine lines of oxide superconductor is bonded to one side of this plate using a paste process, lamination of green sheets or any other suitable process. The pattern of lines 10 may be a spiral around the bore 11 from the inner diameter of the plate 12 to the outer diameter or a series of concentric circles broken by current connections (Figs. 1A and 1B). The pattern of lines may be deposited and interconnected on both sides of the plate using a feed through at the joined area as shown. The pattern of lines on the superconductor may undergo various processes which result in a volume change (such as removal of binder, densification, etc. as a flat sheet on the plate). Prior to final reaction of the superconductor, a number of plates are stacked about a central mandrel and fastened together with tie bolts. The plates are arranged such that current may flow from one plate to the adjacent plate at the contact pad, resulting in an overall helix current path from one end of the magnet to the other. Suitable connections are made on the top and bottom plates for the introduction of...