Patent ID: 9212782
Filing Date: 2015-12-15
Classification: F17C,G01R,Y10T

Abstract:
1. A cryostat comprising: an outer vacuum container; a cryogen vessel contained within said outer vacuum container, said cryogen vessel operating with a cryogen gas and having a vent path that allows a portion of said cryogen gas to exit from said cryogen vessel; a substantially cylindrical, closed thermal radiation shield between said cryogen vessel and said outer vacuum container, said thermal radiation shield surrounding said cryogen vessel and thermally shielding said cryogen vessel from thermal radiation emanating from said outer vacuum container; said thermal radiation shield being comprised of a plurality of shield parts joined together to form a closed, hollow cylinder having an internal surface that faces said cryogen vessel; and said thermal radiation shield comprising a joining conduit interposed between and joining two of said shield parts, said joining conduit comprising a conduit body that proceeds along a circumference of said closed cylinder and that forms a part of said interior surface of said closed cylinder, said conduit body comprising two flanges that respectively engage said two of said shield parts to join said two of said shield parts together, and said conduit body having a bore therein that also extends along said circumference and that is in communication with said vent path to direct at least some of said portion of said cryogen gas in said vent path through said bore to augment the thermal shielding of the cryogen vessel by said thermal radiation shield.