File:Quantum refrigerator at UCL (17194082853).jpg

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This photo shows a high-powered refrigerator, used for cooling samples to within a fraction of absolute zero. (When in operation, the refrigerator is entirely enclosed in a sealed and insulating casing.) As with a household fridge, the temperature is lower towards the bottom. The top shelf has a temperature of about 50 Kelvins (-223 Celsius), the next down is at around 4.4 kelvins (-269 Celsius), then 0.08K and 0.03K (-273 Celsius), just above absolute zero (0K).

The refrigerator is used to cool small objects, such as transistors, down to levels where thermal effects such as the vibration of the atoms in them are eliminated, allowing quantum effects to be observed.

The refrigerator, which is cooled by a mixture of Helium-3 and Helium-4, is located in UCL's department of Physics & Astronomy.

Photo credit: O. Usher (UCL MAPS)
Date
Source Quantum refrigerator at UCL
Author UCL Mathematical and Physical Sciences from London, UK

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by UCL Mathematical and Physical Sciences at https://flickr.com/photos/93636241@N07/17194082853. It was reviewed on 5 August 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

5 August 2016

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current01:12, 5 August 2016Thumbnail for version as of 01:12, 5 August 20163,456 × 5,184 (3.82 MB)Blythwood (talk | contribs)Transferred from Flickr via Flickr2Commons

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