초록

A cryostat including a horizontal hollow space section of room temperature in which a liquid helium vessel is supported by a plurality of support structures each having a multiple cylinder of small thickness and a liquid nitrogen vessel is supported by a plurality of tension rods.

대표청구항 ▼

A cryostat comprising: a hollow cylindrical liquid helium vessel containing a superconductive magnet coil and liquid helium; a plurality of cylindrical heat insulating plates enclosing said hollow cylindrical liquid helium vessel; a liquid nitrogen vessel located outwardly of one of said plurality o

A cryostat comprising: a hollow cylindrical liquid helium vessel containing a superconductive magnet coil and liquid helium; a plurality of cylindrical heat insulating plates enclosing said hollow cylindrical liquid helium vessel; a liquid nitrogen vessel located outwardly of one of said plurality of cylindrical heat insulating plates in enclosing relation; a vacuum vessel enclosing said liquid nitrogen vessel and having a hollow room temperature space section formed substantially in a central portion; and a plurality of rods formed of material of low thermal conductivity for supporting said liquid nitrogen vessel in said vacuum vessel under tension; wherein the improvement resides in that: said liquid helium vessel extends substantially horizontally and has a plurality of shaft-like projections each extending outwardly from one of opposite end walls thereof; said liquid nitrogen vessel extends substantially horizontally and has a plurality of hollow cylindrical portions each formed at one of opposite ends thereof in positions corresponding to said shaft-like portions of the liquid helium vessel so that the shaft-like projections and the hollow cylindrical portions are located concentrically with each other; and a plurality of support structures each composed of a multiple cylinder of small thickness formed of material of low thermal conductivity connecting said shaft-like projections to said hollow cylindrical portions, said multiple cylinder including a plurality of cylinders connected to each other alternately at opposite ends and in central portions.