An adjustable Joule-Thomson cryogenic cooler with a downstream thermal compensation mechanism is taught. The cryogenic cooler includes a cryogen source coupled to a manifold input port, the manifold input port connected to a heat exchanger, the heat exchanger coupled to an orifice block, and the orifice...http://www.google.es/patents/US4028907?utm_source=gb-gplus-sharePatente US4028907 - Adjustable-Joule-Thomson cryogenic cooler with downstream thermal compensation
Adjustable-Joule-Thomson cryogenic cooler with downstream thermal compensation