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Cryostat having a first and a second helium tank, which, at least in a lower region are separated from each other in a liquid-tight manner
Cryostat having a first and a second helium tank, which, at least in a lower region are separated from each other in a liquid-tight manner
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机译：具有第一氦罐和第二氦罐的低温恒温器，第一氦罐和第二氦罐至少在下部区域以液密方式彼此分离
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摘要
In summary, the present invention proposes, in the case of a cryostat (20) for subcooled (& 2,5 k) liquid helium, which is typically for cooling a superconducting magnet coil (6) is used, two helium tank (24, 5) is provided which, with respect to the liquid helium in each case contained do not communicate with one another. A joule - thomson - cooling unit (2), with a heat exchanger (38) in the lower part (1) of the first tank (24), uses in the second helium tank (5) draws liquid helium (& 4 k), in order to the resultant subcooled liquid helium in the lower part (1) of the first tank (24) to cool. The joule - thomson - cooling unit (2) for this purpose either directly sucks liquid helium from the second helium tank (5), or, the suction effect of the liquid helium from the first helium tank (24) at, typically made of an upper part (4) with liquid helium 4 k, and liquid helium, it is possible, via the gas phase by the second helium tank (5) in the first helium tank (5) are converted. As a result, the time period in which the supercooled liquid helium of the first tank (24) by means of a helium supply in the cryostatic temperature regulator (20) can be cooled, to be set up for very long. The second helium tank (5) can be at least partially, in addition to the first helium tank (24), in particular also the first helium tank (24), are arranged, in order to achieve a low overall height of the cryostat (20) to realize.
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