Patent ID: 9293253
Filing Date: 2016-03-22
CPC Classification: G01R,H01F

Claim Text:
1. A cylindrical superconducting magnet structure, comprising: a plurality of resin-impregnated, axially aligned annular coils of superconducting wire, each coil having an axis around which the coil is wound, and a radially outer surface and a radially inner surface; a tubular support structure at least partially surrounding the respective radially outer surfaces of said annular coils and having a larger diameter than said radially outer surfaces, each of said annular coils exhibiting a thermal resistance between the respective annular coil and the tubular support structure; a cooling arrangement in thermal communication with said tubular support structure that cools at least said tubular support structure to a cryogenic temperature; and a cryogenic radiation shield between the respective radially inner surfaces of the annular coil and the respective axes of the annular coils, said cryogenic radiation shield comprising a metal cylinder mechanically joined to the tubular support structure at a plurality of axial and circumferential intervals, and comprising a plurality of thermally linking structures that thermally link the metal cylinder to the tubular support, each of said thermally linking structures having a thermal resistance that produces a thermal resistance between the metal cylinder and the tubular support structure that is less than the respective thermal resistances between the annular coils and the tubular support structure.