| 摘要 |
<p>A cold exchange system includes a Dewar flask having an evacuation port (18) through inner and exterior vessels (13, 11) through which cryogenic gas contained in the inner vessel (13) can evaporate during the cold exchange process. A device to be cooled is housed in a housing that is engaged over a device port (24) on the exterior vessel (11). A cold finger (30) is in heat transfer contact with the inner vessel (13). A non-metallic flexible bellows (32) is sealingly adhered to the cold finger (30) at one open end of the bellows. The non-metallic bellows is sealingly adhered at its other open end to a top plate (36) which is vacuum fitted over the device port. Separation of the vacuum chambers (17, 42) is maintained by the non-metallic bellows (32) and adhesive joints (47) between the bellows and the cold finger (30) and top plate (36).</p> |
