Cryogen free lab cryostats [ Return towards Cryogenic laboratory equipment ]

Samples cooled without cryogens

These cryostats have a built-in pulse tube cryocooler so that temperatures can be achieved of between 2.8K and 300K.

(© Air Liquide / Photo Patrick Avavian) The system consists of:
• A vacuum specimen carrier, its temperature regulated between 2.8K and 300K. This is very easy to access and generously designed so that it can accommodate any sample type.
• A cryostat that can incorporate up to 4 removable windows for different observations
• A 50-80K radiation screen surrounding the specimen carrier
• A feedthrough for the specimen carrier instrumentation
• A temperature regulator (BT500 or the like)
• A pulse tube cooler with water- or air-cooled compressor

Key benefits

Safety: no handling of cryogens and elimination of associated risks
Reduced operating costs: the infrastructure and logistics related to the storage, distribution and consumption of cryogens is replaced by electricity consumption
Simplified implementation: straightforward start-up and turnaround procedures, much reduced training

Key technical characteristics

The system consists of:

a vacuum specimen carrier, its temperature regulated between 2.8K and 300K. This is very easy to access and generously designed so that it can accommodate any sample type.
a cryostat that can incorporate up to 4 removable windows for different observations
a 50-80K radiation screen surrounding the specimen carrier
a feedthrough for the specimen carrier instrumentation
a temperature regulator (BT500 or the like)
a pulse tube cooler with water- or air-cooled compressor

References

250mW pulse tube optical cryostat at 4K for the Institute of Nuclear Physics at Lyon – IN2P3 (National Institute for Nuclear Physics and Particle Physics)
Cryostat for cooling bolometers (300mK supplied per additional Helium 3 adsorption stage): European Space Agency, ESTEC.
Cryostat for cooling bolometers (10mK supplied per additional Helium3/Helium 4 dilution stage): National Institute of Nuclear Physics- Milan-COMO Italy