Claims
- 1. In a cryostat wherein a first liquified gas is contained in a central vessel and said central vessel is surrounded by shielding means maintained at the temperature of another liquified gas of higher boiling point, said cryostat further comprising a containment vessel at ambient temperature, said containment vessel comprising a wall portion having an interior surface spaced from the outer surface of said shielding means, the improvement comprising:
- a radiation shield disposed between the interior surface of said containment vessel and the outer surface of said shielding means;
- mechanical refrigerating means for maintaining said radiation shield at a temperature substantially intermediate said shielding means and ambient temperature during operation.
- 2. The apparatus of claim 1 wherein said mechanical refrigerating means comprises heat transfer means communicating from said mechanical refrigerating means to said shielding means, and said containment vessel comprises a conduit to which conduit said heat transfer means maintains thermal contact between said radiation shield and said mechanical refrigerating means.
Parent Case Info
This is a continuation of application Ser. No. 879,289, filed 2/21/78 now abandoned.
US Referenced Citations (13)
Continuations (1)
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Number |
Date |
Country |
Parent |
879289 |
Feb 1978 |
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