Abstract Under contract with the Jet Propulsion Laboratory (Advanced Cryocooler Technology Development Program), Lockheed Martin’s Advanced Technology Center (LM-ATC) is developing a four-stage pulse tube cryocooler and electronic controller to provide simultaneous cooling at 6 K and 18 K. LM-ATC successfully completed the design phase of the program, where a robust, simple pulse tube cryocooler system was designed to meet JPL’s cryocooler needs. The simplicity of LM-ATC s approach, with a single compressor, coldhead and electronic controller, makes it very appealing for the large observatories (Constellation-X, Terrestrial Planet Finder, and the James Webb Space Telescope) that require high reliability. The cryocooler is designed simultaneously to provide 20 mW of cooling at 6 K and 150 mW cooling at 18 K while conductively rejecting heat at 290K. The Lockheed Martin pulse tube is a simple four-stage coldhead with no moving parts, driven by a linear flexure-bearing compressor, powered by a high-efficiency electronic controller. The controller provides simultaneous temperature control at both 6 K and 18 K, vibration cancellation, and bus current ripple suppression. This paper summarizes the characteristics of the system and the status of the program.
Lockheed Martin 6K/18K Cryocooler
Cryocoolers 13 ; 25-30
2005-01-01
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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