Scientific Research News Link: The Shanghai Institute of Technical Physics Makes Progress in Hybrid Cryogenic Cycle Technology Research
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2022-04-16
Recently, the research team led by Dr. Haidang Dang from the Shanghai Institute of Technical Physics of the Chinese Academy of Sciences adopted a hybrid cryogenic cycle, in which the pulse tube subsystem acts as the precooler while the JT subsystem as the final cooling stage. This approach achieved the lowest temperature of 1.36 K ever publicly reported for the hybrid cryogenic cycle based on the multi-stage high-frequency pulse tube coupled JT. The team proposed an innovative hybrid cryogenic cycle approach that uses 4He instead of expensive and rare 3He as the only working medium to achieve temperatures of below 2 K. Furthermore, in collaboration with the team of the Shanghai Institute of Microsystem and Information Technology, they used a hybrid cryocooler with 4He as the only working medium to cool superconducting nanowire single photon detectors (SNSPD), and measured the key performance indicators such as system detection efficiency (SDE) and dark count rate (DCR). The results indicate that the developed cryocooler can provide effective cooling at 1.84 K and the favourable electrical environment, which ensures the SNSPD to work stably and reliably.These results will not only make it feasible for the future space application of the SNSPD, but also pave the way to break the bottleneck of its wide application in a variety of fields. The relevant achievements have been published successively in Cryogenics, IEEE Transactions on Applied Superconductivity, and Chinese Science Bulletin.
Photos of the actual hybrid cryocooler at 1-2 K
(a) Experimental setup; (b) Cold ends
Links to the articles:
1. A hybrid cryocooler achieving 1.8 K with He-4 as the only working medium and its application verification
2. Investigations on a 1 K hybrid cryocooler composed of a four-stage Stirling-type pulse tube cryocooler and a Joule-Thomson cooler. Part B: Experimental verifications
3. Investigations on a 1 K hybrid cryocooler composed of a four-stage Stirling-type pulse tube cryocooler and a Joule-Thomson cooler. Part A: Theoretical analyses and modeling
4. A 1-2 K Cryogenic System With Light Weight, Long Life, Low Vibration, Low EMI and Flexible Cooling Capacity for the Superconducting Nanowire Single-Photon Detector
5. Investigations on a 3.3 K four-stage Stirling-type pulse tube cryocooler. Part A: Theoretical analyses and modeling
6. Investigations on a 3.3 K four-stage Stirling-type pulse tube cryocooler. Part B: Experimental verifications
7. Theoretical and experimental investigations on the three-stage Stirling-type pulse tube cryocooler using cryogenic phase-shifting approach and mixed regenerator matrices
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