不透气
发表于 2025-4-1 01:57:47
tly colder than possible with passive radiators) and have multiyear life without the finite life limitations of stored cryogens. The first cryocoolers in space were short-life Joule–Thomson and Stirling cryocoolers flown on both US and USSR missions around 1970. Since that time, extensive research a
Asseverate
发表于 2025-4-1 06:32:46
liquid helium temperatures primarily for cooling superconducting devices. In each case, the reader should observe that critical technologies were developed to facilitate these applications. In addition to these three primary advances, other significant helium cryogenic technologies are briefly revi