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The 40 K low-temperature environment is crucial for the operation of long-wave infrared detectors. To explore higher efficiency in 40 K cryocoolers, this paper designed and manufactured a single-stage 40 K pulse tube cryocooler. Through rigorous experimentation, we determined the optimal inertance tube and charging pressure for the cryocooler, subsequently subjecting it to performance testing. Additionally, to assess its adaptability to diverse environmental conditions, we conducted thorough evaluations of the cryocooler's cooling performance across a range of hot-end temperatures. Notably, when heat was rejected into ambient temperature environment, with an input electrical power of 200 W, the cryocooler obtained a cooling capacity of 3.2 W/40 K, reaching a relative Carnot efficiency of 10.3%.
| Submitters Country | China |
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