A dilution microcryostat cooled by a refrigerator with an impulse tube

A dilution microcryostat is described, which is designed for conducting physical measurements at temperatures down to 0.1 K or lower. A refrigerator with an impulse tube is used to provide its operation. Owing to the use of a passive stabilization system, which is based on helium condensation, the temperature can be maintained at a level of 0.1 K for 5 h at the disabled refrigerator. The microcryostat is used to investigate low-temperature radiation detectors.