Method and apparatus for cooling superconductive joints
In a method and apparatus for joining a number of superconductive cables to establish electrical connection therebetween, a cup-like member having a base, a sidewall, and an opening to receive electrically conductive ends of said cables is provided. The base of the cup-like member is attached to a holder device. The holder device is attached to a cryogenically cooled surface. The ends of the superconductive cables are connected together within the cup-like member.
1. An arrangement for cooling a superconductive joint while providing voltage isolation thereof, comprising a receptacle that surrounds respective portions of two superconductors that form a superconductive joint also surrounded by said receptacle, a jointing material in which said joint is embedded within said receptacle; a cooled surface that superconductively cools said joint embedded in said joining material, and an electrically isolating layer adjacent said surface of said receptacle and interposed between said surface of said receptacle and said cooled surface.
2. An arrangement according to claim 1 wherein the receptacle is of cup-like form, having a base, a sidewall and an opening to receive said joint, and wherein said receptacle is attached to said cooled surface by said base.
3. An arrangement according to claim 1 wherein the receptacle is of tubular form, having a sidewall and an opening to receive said joint, and wherein said receptacle is attached to said cooled surface by said sidewall.
4. An arrangement according to claim 3 wherein said cooled surface comprises a cylindrical cavity, wherein the tubular receptacle is located, said electrically isolating layer being interposed between the sidewall of the tubular receptacle and a wall of the cylindrical cavity.
5. An arrangement according to claim 1 , wherein the receptacle is attached to said cooled surface by an adhesive, said adhesive forming said electrically isolating layer.
6. An arrangement according to claim 5 , wherein said electrically isolating layer is provided to a predetermined thickness.
7. An arrangement according to claim 1 , wherein the receptacle is attached to a holder device by interposition of an electrically isolating layer; and said holder device is attached to a cooling means.
8. An arrangement according to claims 7 , wherein the holder device is formed of a metal.
9. An arrangement according claim 8 , wherein at least a substantial portion of the holder device is fabricated from aluminum.
10. An arrangement according to claim 7 , comprising a medium that enhances thermal contact applied between the holder device and the cooling means.
11. An arrangement according to claim 10 , wherein said medium comprises a hydrocarbon grease.
12. An arrangement according to claim 1 , wherein the receptacle is attached to said holder device by an adhesive, said adhesive forming said electrically isolating layer.
13. An arrangement according to claim 12 , wherein said electrically isolating layer is provided to a predetermined thickness.
14. An arrangement according to claim 1 , wherein the receptacle is formed of a thermally conductive material.
15. An arrangement according to claim 14 , wherein the thermally conductive material is selected from the group consisting of brass or copper.