A SUPERCONDUCTING DEVICE

摘要

A superconducting device (10) comprises a vacuum chamber (12) and means (14) to evacuate the vacuum chamber (10). A base plate (16) is provided within the vacuum chamber (12) and first, second and third cylindrical walls (18, 20, 22) extend from the base plate (16). The second and third cylindrical walls (20, 22) are arranged coaxial with the first cylindrical wall (18). A first chamber (24) is defined between the first cylindrical wall (18) and the second cylindrical wall (20), a second chamber (26) is defined between the second cylindrical wall (20) and the third cylindrical wall (22) and a third chamber (29) is defined within the third cylindrical wall (22). A superconducting wire (30) is arranged within the second chamber (26) and a cryogenic insulating material (34) is arranged within the second chamber (26) to encapsulate the superconducting wire (30). A material (36) having a high specific heat capacity is arranged within the first chamber (24) and there are means (38, 40) to cool the base plate (16).