Refrigeration – Storage of solidified or liquified gas – With conservation of cryogen by reduction of vapor to liquid...
Patent
1996-10-31
1997-12-30
Kilner, Christopher
Refrigeration
Storage of solidified or liquified gas
With conservation of cryogen by reduction of vapor to liquid...
62 511, 324320, 335301, F17C 502, H01F 722, F25B 1900
Patent
active
057017441
ABSTRACT:
A cryogen recondensing system magnetic resonance imager superconducting magnet and a cryogen recondensing system with a rare earth displacement material cryocooler and superconductive lead bismuth magnetic sleeve provides superconducting current flow of currents induced by movement of the rare earth displacer which generate opposing magnetic fields to shield the superconducting magnet from the magnetic interference of the cryocooler rare earth displacer. Strips of high conductivity wave-shaped aluminum or sapphire rods may be embedded in the surface of the sleeve to lower the thermal resistance of the superconducting shield to enable it to quickly reach superconducting temperature.
REFERENCES:
Paper "Realization of Low Magnetic Field in Bi-Sr-Ca-Cu-O Superconducting Cylinder Under Earth Field Cooling" By Matsuba et al. presented at 7th CIMTEC World Ceramic Congress, Jul. 2-3, 1990, Trieste, Italy.
Eckels Phillip William
Hayworth Gregory Farin
King Christopher G.
Sato Kazuhiko
Ward Granville Geer
Freedman Irving M.
General Electric Company
Kilner Christopher
Pilarski John H.
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