Abstract
An adiabatic demagnetization refrigerator (ADR) operating between 2 K and 10 K has been built and tested. The refrigerant in the ADR is Gadolinium Gallium Garnet (GGG). Absorption of heat at 2 K and heat rejection at 10 K in this fully static refrigerator is made possible by the incorporation of 2 K and 10 K heat switches. The physical layout and experimental results are presented in a parallel paper, whereas the current paper presents the computational point of view. The performance of the as-built ADR is assessed taking into account the dimensional features of the ADR components, the thermal characteristics of the components (heat capacity, latent heat, thermal resistance), the GGG entropy diagram and thermal loss mechanisms as they occur during the refrigeration cycle (eddy current heating, temperature gradients). The results are summarized in terms of the ADR efficiency.
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