In astronomical observations, detectors operating in the sub-Kelvin temperature range require extremely stable working temperatures. Adiabatic demagnetization refrigerators (ADR), as the sub-Kelvin refrigerator that is independent of gravity and offers high temperature control precision, have become the preferred choice for astronomical observation missions. The high temperature control...
The demand for extremely low temperatures in quantum computing and quantum devices has led to significant interest in advanced refrigeration methods. Among these methods, the continuous adiabatic demagnetization refrigerator (cADR) presents a promising alternative that does not rely on the increasingly scarce He3. While traditional dilution refrigerators (DR) are effective in reaching low...
As interest in quantum-related research continues to grow, so does the demand for ultra-low temperatures below 1 K. Cooling systems designed to achieve such ultra-low temperatures include Dilution Refrigerators (DR), Pulse-Tube cryocoolers with Joule-Thomson modules (PT-JT), and Adiabatic Demagnetization Refrigerators (ADR). Unlike DR and PT-JT systems, ADRs do not rely on fluids but instead...
The superconducting heat switch is a critical component in an adiabatic demagnetization refrigerator (ADR) to achieve a temperature lower than 50 mK, and its switching performance significantly affects the overall efficiency of the ADR. We have designed a superconducting heat switch utilizing high-purity tin (99.99%) as the superconducting material, and have carried out experimental testing on...
