초록 ▼

A cryostat including a source of refrigeration disposed within an evacuated chamber containing a reservoir of liquified cryogen wherein refrigeration is directed to heat stations disposed in the access means to the reservoir to intercept heat leak into said reservoir and to recondense cryogen boil-o

A cryostat including a source of refrigeration disposed within an evacuated chamber containing a reservoir of liquified cryogen wherein refrigeration is directed to heat stations disposed in the access means to the reservoir to intercept heat leak into said reservoir and to recondense cryogen boil-off from said reservoir. Thermal convective couplings are used to cool the heat stations and to minimize heat leakage in the event the refrigeration source is disabled. Cryogen boil-off is condensed in an apparatus utilizing low thermal conductive conduits to direct the vapors to a refrigeration zone and return the condensed cryogen to the reservoir.

대표청구항 ▼

A thermal coupling interposed between a source of refrigeration and an object to be cooled comprising in combination: an elongated fluid-tight housing having first and second ends, said first end adapted to mechanically contact a source of refrigeration and said second end adapted to mechanically co

A thermal coupling interposed between a source of refrigeration and an object to be cooled comprising in combination: an elongated fluid-tight housing having first and second ends, said first end adapted to mechanically contact a source of refrigeration and said second end adapted to mechanically contact said object to be cooled; means within said housing having a flow path whereby a fluid in the form of a gas which remains gaseous at the lowest temperature provided by said refrigeration source and disposed within said housing, can when warmed by giving up refrigeration rise from said second end toward said first end where it is cooled and returned to said second end along a separate path without contacting warmed rising gas.