초록 ▼

A radiation shield assembly is provided for a cryostat having a helium vessel and which inlcudes a penetration for cooling the helium vessel. The radiation shield assembly comprises a shield having means for conducting heat toward the cryostat penetration, means for providing an isothermal surface a

A radiation shield assembly is provided for a cryostat having a helium vessel and which inlcudes a penetration for cooling the helium vessel. The radiation shield assembly comprises a shield having means for conducting heat toward the cryostat penetration, means for providing an isothermal surface and means for reflecting radiation. The shield surrounds the helium vessel, and is spaced away from the helium vessel by spacer means comprising isolated packets of powder insulation in permeable packages.

대표청구항 ▼

A radiation shield assembly for a cryostat having a generally cylindrical inner helium vessel, said cryostat defining a penetration for cooling the helium vessel, said radiation shield assembly comprising: a plurality of layers of multilayer insulation surrounding the helium vessel; a pair of rigid

A radiation shield assembly for a cryostat having a generally cylindrical inner helium vessel, said cryostat defining a penetration for cooling the helium vessel, said radiation shield assembly comprising: a plurality of layers of multilayer insulation surrounding the helium vessel; a pair of rigid end rings each having a flange extending axially from the ring periphery, said rings fabricated from nonmagnetic material and having a diameter greater than the ends of the generally cylindrical inner helium vessel when surrounded by said multilayer insulation, one of said end rings situated adjacent to each end of the helium vessel with said end ring flanges extending over the multilayer insulation and supported thereby; a flexible shield including means for conducting heat toward the cryostat penetration and means for providing an isothermal surface, said shield surrounding the multilayer insulation wrapped helium vessel and said rigid end rings; and clamping means for holding said flexible shield under tension around said end rings to prevent said flexible shield from sagging.