Automated unit for physical research on quantum crystals at millikelvin temperatures

A cryogenic unit designed for physical research on quantum crystals at ultr alow temperatures is described. The unit includes a dilution refrigerator w ith a hybrid He-3 circulation system, an antivibration protection system, a nd a system of automated control and data acquisition and processing. The c onstruction of the basic units, the thermometry system, the algorithms for measurements, and the software for conducting research on quantum crystals by the method of precision pressure measurements are described. The unit ma y be used for performing a wide range of tasks in research on various conde nsed systems at millikelvin temperatures. (C) 2001 American Institute of Ph ysics.