Experimental study of a single-stage adiabatic demagnetization refrigerator after vibration reduction

Abstract The adiabatic demagnetization refrigerator (ADR), based on the principle of magnetocaloric effect, is a solid-state cooling device. One of its key advantages is the ability to operate under microgravity conditions while offering high thermodynamic efficiency and modular design. Moreover, it stands out as one of the few coolers capable of achieving sub-Kelvin temperatures. As a result, it is gaining significant attention in space applications requiring extremely low temperatures. This study presents the design and experimental performance of a single-stage adiabatic demagnetization refrigerator. The ADR incorporates a superfluid helium bath, providing a precooling temperature of approximately 1.2 K. The magnetocaloric material chosen for this setup is a paramagnetic salt (CPA). A superconducting magnet supplies a magnetic field of 2 T. Experimental measurements show that, under adiabatic conditions, this single-stage ADR can obtain a minimum temperature of 73.58 mK upon completely removing the magnetic field.