Rotating sub-mK nuclear demagnetization refrigerator with NMR spectrometer and He filling lines for He experiments.

Main characteristics:
• Minimum temperature in 3He sample: 140 µK (combination of dilution refrigerator and nuclear cooling stage).
• Rotation velocity up to 4 rad/s.
• Heat leak to sample in rotation: below 25 pW.
• Cooldown time to the lowest temperatures: 1-2 weeks.
• He boiloff: total 30 liters/day.
Instrumentation:
• Low temperature NMR for 3He.
• Interface between superfluid 3He-A and 3He-B phases.
• Magnon Bose-Einstein condensates.
• Quartz tuning forks.