Siemens Corporation

Timothy John Hughes

Keith White

Stephen Paul Trowell

Stephen Joseph Shelford Lister

A thermal interface between a removable cryogenic refrigerator () and an article () to be cooled by the cryogenic refrigerator. The thermal interface consists of a recondensing chamber filled with a gas (), the recondensing chamber being in thermal contact with a cooling surface () of the refrigerator and the article () to be cooled.

Cooling apparatus comprising a thermal interface and method for recondensing a cryogen gas

In order to minimize the loss of cryogen during transportation of superconductive magnet systems, or indeed at any time that the refrigerator is turned off, part of the boil-off gas is directed from the cryogen vessel through the refrigerator interface and past the refrigerator to cool the refrigerator. Some of the heat conducted along the refrigerator into the system is intercepted and removed by that part of the boil-off gas. The heat load onto the cryogenic vessel is thereby reduced, which in turn reduces the boil-off of cryogen from the cryogenic vessel. This part of the boil-off gas is then vented from the system along with the remainder of the boil-off gas, for example to leave the cryogenic liquid vessel via the access neck.

Reduction of cryogen loss during transportation

A cryogenic magnet system, comprising a cryogenic vessel () housing a magnet winding, a vacuum jacket () enclosing the cryogenic vessel and a refrigerator () at least partially housed within the vacuum jacket and thermally linked () to the cryogenic vessel. In particular, the system further comprises an electromagnetic shield.

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New Milton, United Kingdom

Timothy John Hughes