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Research on the spring-loaded GGG salt pill for adiabatic demagnetization refrigerators.

Number: 0025

Author(s) : ZHAO P., SHEN J., LI K., LIU P., LI Z., DAI W.

Summary

Adiabatic demagnetization refrigerators (ADR), as a sub-Kelvin refrigerator, has been widely studied for its advantages of high efficiency, gravity independence and high temperature control accuracy, and is especially suitable for space applications. Crystals represented by GGG, owing to their excellent performance in cooling power and thermal conductivity, are often fabricated into salt pills for ADR in the temperature range of 1 K. Heat transfer between the crystal and other components usually relies on copper fingers. Reliable and efficient connection between copper fingers and crystal is an important issue. This paper compares different crystal salt pill structures and proposes a spring-loaded salt pill structure. With GGG as the salt pill, the experiments show that the single stage ADR can obtain a cooling temperature of 800.4mK when starting from an initial temperature of 4K.

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Pages: 7

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Details

  • Original title: Research on the spring-loaded GGG salt pill for adiabatic demagnetization refrigerators.
  • Record ID : 30032633
  • Languages: English
  • Source: 10th IIR Conference on Caloric Cooling and Applications of Caloric Materials
  • Publication date: 2024/08/24
  • DOI: http://dx.doi.org/10.18462/iir.thermag.2024.0025

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