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Electrical bushing for a superconductor element

United States Patent

May 4, 2010
View the Complete Patent at the US Patent & Trademark Office
The invention relates to an electrical bushing serving to make a connection at ambient temperature to a superconductor element situated in an enclosure at cryogenic temperature. The electrical bushing passes successively through an enclosure at intermediate temperature between ambient temperature and cryogenic temperature, and an enclosure at ambient temperature, and it comprises a central electrical conductor surrounded by an electrically insulating sheath. According to the invention, an electrically conductive screen connected to ground potential surrounds the insulating sheath over a section that extends from the end of the bushing that is in contact with the enclosure at cryogenic temperature at least as far as the junction between the enclosure at intermediate temperature and the enclosure at ambient temperature. The invention is more particularly applicable to making a connection to a superconductor cable.
Mirebeau; Pierre (Villebon S/yvette, FR), Lallouet; Nicolas (Fiennes, FR), Delplace; Sebastien (Ardres, FR), Lapierre; Regis (Marck, FR)
Nexans (Paris, FR)
11/ 373,853
March 9, 2006
GOVERNMENT LICENSE RIGHTS This invention was made with government support under contract No. DE-FC36-00GO13032 awarded by the Department of Energy (DOE). The government has certain rights in the invention.