Sources Sought Optical Access Dilution Refrigerator

The National Institute of Standards and Technology (NIST) is seeking information on vendors that can provide an Optical Access Dilution Refrigerator per the specifications attached. The cryostat system should have a base temperature of less than 15 mK, free space optical access, and enough cooling power to maintain continuous operation below 15 mK. It should also include a pulse tube cooler, thermometry, support structures, pumps, and heaters necessary for continuous operation. The system should be cryogen-free, have a water-cooled compressor, and flexible lines between the compressor and the cold head. Key features of the system include: • Base temperature of less than 15 mK • Free space optical access • Cooling power to maintain continuous operation below 15 mK • Pulse tube cooler with greater than 1.3 W cooling power at 4.2 K • Thermometry, support structures, pumps, and heaters for continuous operation • Cryogen-free system with a water-cooled compressor • Flexible lines between the compressor and the cold head NIST is seeking responses from all responsible sources, including large and small businesses, to determine if any Small Business Set-aside opportunities exist.