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Recirculating Gas Cooler

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The ongoing global helium shortage continues to affect many research institutes using continuous transfer cryostats due to high operating costs or limited LHe availability. The "Recirculating Gas Cooler" is now offering a solution to help researchers.

Janis Research has developed a series of cryogen free, low vibration, closed cycled cryocooler systems that use recirculating helium gas as a direct replacement for liquid helium, to cool continuous flow cryostats without the use of LHe. Pulse tube-cooled (PT) and Gifford-McMahon (G-M) cryocooler options are available, in various capacities and base temperature configurations. Helium gas passes through a series of heat exchangers on the cryocooler, and then flows through the integrated vacuum insulated transfer line into the cryostat. After cooling the sample, the gas is then returned to the cryocooler for re-cooling and continued circulation.

These „Recirculating Gas Cooler“ systems are available for use with almost any existing continuous transfer type cryostats, such as the Janis SuperTran series. The interchangeable system transfer line tips make the cryogen free cryostat universal for all Janis SuperTran cryostats including Models ST-100, ST-300, ST-400 and ST-500. The microscopy cryostat system ST-500 with proper mounting, maintain the vibration level on the cryostat body at less than 20 nm.