Helium-3 refrigerator

Helium-3 refrigerator

A helium-3 refrigerator is a simple device used in experimental physics for obtaining temperatures down to about 0.2 kelvins. By evaporative cooling of helium-4 (the more common isotope of helium), a 1-K pot liquefies a small amount of helium-3 in a small vessel called a helium-3 pot. Evaporative cooling of the liquid helium-3, usually driven by adsorption since due to its high price the helium-3 is usually contained in a closed system to avoid losses, cools the helium-3 pot to a fraction of a degree kelvin. [ [http://www.cryoindustries.com/3he.pdf Cryo Industries helium-3 refrigerator diagram] ]

ee also

Dilution refrigerator

References

External links

* [http://www.its.caltech.edu/~jpelab/cryogenics.html Helium-3 refrigerators at Caltech]


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