10K Pulse Tube Cooler
A 3-stage pulse tube cooler has been designed to operate at 10¶K. The staged cooler uses the same compressor and parallel staging configuration for the 1 st and 2 nd stages as previously employed for our delivered High Capacity Cryocooler (HCC). The 2 nd and 3 rd stages are in a serial configuration. The addition of the third stage extends the performance of this cooler to lower operating temperatures below 10¶K.
High efficiency cryocooler
The High Efficiency Cryocooler (HEC) is a highly reliable, >10 year life, space cryocooler. Design goals included very high capacity with low mass. The HEC achieved its 10 W at 95 K load while rejecting to 300 K with considerable margin and a flight configured mass of 4 Kg. This flight cooler design is being fabricated for a number of payloads. This paper describes the cooler, its measured performance, and its flight qualification.
High Capacity Two-Stage Pulse Tube Cooler
This paper describes the design, construction, and testing of a two-stage pulse tube cooler that can simultaneously provide 2W of cooling at 35K and 20W of cooling at 85K. This cooler, which was designed for space application, is light weight, power efficient and has long life. The two stage cold head is driven by a TRW second generation flexure bearing compressor.