한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제24권4호
  • /
  • Pages.71-77
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  • 2022
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  • 1229-3008(pISSN)
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  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
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Review on innovative small refrigeration methods for sub-Kelvin cooling

  • Dohoon, Kwon (Cryogenic Engineering Laboratory, Korea Advanced Institute of Science and Technology) ;
  • Junhyuk, Bae (Cryogenic Engineering Laboratory, Korea Advanced Institute of Science and Technology) ;
  • Sangkwon, Jeong (Cryogenic Engineering Laboratory, Korea Advanced Institute of Science and Technology)
  • 투고 : 2022.11.28
  • 심사 : 2022.12.28
  • 발행 : 2022.12.31
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초록

Sub-Kelvin cooling has been generally demanded for the fields of low temperature physics, such as physical property measurements, astronomical detection, and quantum computing. The refrigeration system with a small size can be appropriately introduced when the measurement system does not require a high cooling capacity at sub-Kelvin temperature. The dilution refrigerator which is a common method to reach sub-Kelvin, however, must possess a large 3He circulation equipment at room temperature. As alternatives, a sorption refrigerator and a magnetic refrigerator can be adopted for sub-Kelvin cooling. This paper describes those coolers which have been developed by various research groups. Furthermore, a cold-cycle dilution refrigerator of which the size of the 3He circulation system is minimized, is also introduced. Subsequently, a new concept of dilution refrigerator is proposed by our group. The suggested cooler can achieve sub-Kelvin temperature with a small size since it does not require any recuperator and turbo-molecular vacuum pump. Its architecture allows the compact configuration to reach sub-Kelvin temperature by integrating the sorption pump and the magnetic refrigerators. Therefore, it may be suitably utilized in the low temperature experiments requiring low cooling capacity.

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과제정보

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT).(NRF-2022R1A2C2091842)

참고문헌

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