Abstract: Magnavox EOS has designed and prototyped two compact Stirling- cycle cryocoolers, the MX7050 and the MX7055, for IR imaging applications. The MX7050 and the MX7055 are designed to meet respectively the U.S. Army B2 specification for the 0.35 watt linear cooler and the 0.6 watt standard advanced dewar assembly IIIB linear cooler. The design objectives were achieved with a common compressor and two different cold expander designs. The MX7050 and the MX7055 prototypes demonstrated cooling capacities far exceeding the design specification over the ambient temperature range of $MIN@54$DGR@C to 71$DGR@C. Test results showed that efficient cooling up to 1.2 watt at 77K was obtained with a MX7055 prototype. The compressor utilizes a dual opposed piston configuration to achieve low output vibration. The coolers are designed to exceed 4000-hour life and weigh about 2 pounds without driver electronics. Cooler electronics for DC-AC conversion and temperature control are available both as an internal part or external part to the cooler. This paper describes the design, fabrication, performance, and test results of the Magnavox MX7050 and MX7055 prototypes. !2
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