Speaker
Description
Dilution refrigerators are widely used in the fields of condensed matter physics and quantum technology. The condensation-driven dilution refrigerator uses a condenser operating at temperatures below that of the Still to liquefy the 3He vapor and achieve the circulation of the 3He, which has the advantages of compact structure, lightweight, low cost, and low vibration. Due to these characteristics, the CDR can meet the requirements of specific applications, such as the forthcoming generation of Cosmic Microwave Background observatories and astrophysics balloon missions. The published research primarily focuses on the system architecture and performance, and in-depth thermodynamics analyses are lacking. In 2023, we built a condensation-driven dilution refrigerator with a lowest no-load temperature 68 mK, and the cooling performances need to be further improved. In this paper, the condensation-driven dilution refrigerator will be modified, optimizations will be made to the heat exchanger of the previous prototype. Experimentally studied and corresponding numerical simulations will be performed, and the results of experiments and simulations will be compared and analyzed. In the experiments, the lower cooling temperature and higher cooling power of the system could be expected. With the help of simulations, the internal dynamic and thermodynamic characteristics of the experimental system during operation will be clarified, which provide guidance for further optimizations.
| Submitters Country | China |
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