Patent ID: 8054077
Filing Date: 2011-11-08
Classification: G01R,Y10T

Abstract:
1. A superconducting coil unit for a magnet, said coil unit comprising: (a) a coil; (b) a thermal shield surrounding the coil; (c) a vacuum vessel surrounding the coil, said vacuum vessel including a service port wall; (d) a hollow tubular element having a wall which is at least partially flexible extending in an inward direction into the vessel from said service port wall to said shield, said hollow tubular element defining an interior space; (d) a cryocooler having a first heat extraction element, said first heat extraction element being disposed within said tubular element when said cryocooler is in an operating position; (e) a thermal conductor extending through the wall of said tubular element, said thermal conductor including an interior portion disposed in said interior space and a flexible exterior portion disposed outside of said tubular element and connected to said shield, said first heat extraction element of said cryocooler being attached to said interior portion of said thermal conductor for heat transfer therebetween, said flexible tubular element and said flexible exterior portion of said thermal conductor permitting movement of said cryocooler outwardly from said operating position to a retracted position.