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Description
To develop a long-wavelength infrared detector, a 40K pulse tube cryocooler is needed to provide reliable and low-noise cooling power. Traditionally, it is generally believed that to improve efficiency, a 40K pulse tube cryocooler needs to operate at around 40Hz. However, low frequency cryocoolers are heavier and are not preferred for use on satellites. In this paper, a lightweight pulse tube cryocooler working at 88Hz is designed. The inertance tubes, along with the reservoir, serve as the only phase-shifter to guarantee the stability. Currently, the cryocooler has achieved a no-load lowest temperature of 26 K. It has a cooling capacity of 7W at 40K while operating at 500W of electrical power, and it weighs only 8kg. The efficiency relative to the Carnot efficiency was approximately 8.8%. The performance characteristics of the designed cryocooler are presented in detail.
| Submitters Country | 中国 |
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