CRYOGENIC FLUID CIRCUIT DESIGN FOR EFFECTIVE COOLING OF AN ELONGATED THERMALLY CONDUCTIVE STRUCTURE EXTENDING FROM A COMPONENT TO BE COOLED TO A CRYOGENIC TEMPERATURE

摘要

A cryogenic system includes a housing of a cryogenic chamber, a cold source in the cryogenic chamber, and a circulation loop for circulating cryogenic fluid between the cold source and a component to be cooled in the cryogenic chamber. The component has an elongated thermally conductive structure extending to a warmer environment. For adjustable cooling of the structure, an incoming stream of the cryogenic fluid is directed along a length of the structure extending from the component, and this stream is split into a first outgoing stream at a first location from the component and a second outgoing stream at a second location further from the component, and an adjustable valve adjusts the fraction of the incoming stream that becomes the second outgoing stream.

主权项

1. A cryogenic system comprising:
a housing of a cryogenic chamber for containing a component to be cooled having an elongated thermally conductive structure extending from the component to be cooled to a warmer environment; a cold source in the cryogenic chamber; and a circulation loop for circulating cryogenic fluid between the cold source and the component in the cryogenic chamber, wherein the circulation loop includes a flow path conduit for directing an incoming stream of the cryogenic fluid along a length of the elongated thermally conductive structure extending from the component, a first outgoing stream conduit branching from the flow path conduit at a first location along the length of the flow path conduit for conducting a first outgoing stream of the cryogenic fluid to return to the cold source, and a second outgoing stream conduit extending from the flow path conduit at a second location for conducting a second outgoing stream of the cryogenic fluid to return to the cold source, and at least one adjustable valve coupled to at least one of the first outgoing stream conduit and the second outgoing stream conduit for adjusting a fraction of the incoming stream of the cryogenic fluid that becomes the second outgoing stream of cryogenic fluid.