Adiabatic Demagnetization Refrigerator

July 2001

Janis Research has announced a cryogen-free, two-stage adiabatic demagnetization refrigerator (ADR) and superconducting magnet system.  The ADR system includes a magnetic shield to provide a field-free environment for cooling field-sensitive detectors.  It offers a typical hold time of more than three days below 100 mK with no added heat load (reaching a base temperature of approximately 60 mK) and a recycling period of about three hours.  The system uses a 4 K pulse-tube closed-cycle refrigerator and has internal isolation against the vibrations that occur during the cooling cycle.  Standard thermometry is supplied at the two stages of the ADR, at the two stages of the refrigerator, and at the magnet.  Power supplies are available for charging and discharging the magnet during the magnetization and demagnetization cycles.  Click here for more information.