Superconducting magnet, c 1990s.

Exton, David

 
Superconducting magnet, c 1990s.
4 0 c m
 
29cm
actual image size: 21cm x 32cm

Description

Superconducting magnets can generate some of the strongest magnetic fields in the laboratory. They are able to do this because of the very highcapacity of superconductors for carrying electric current. Superconductors are materials which offer zero resistance to the pasage of an electric current when cooled to below a certain critical temperature. With early superconductors this was only a few degrees Kelvin (K), meaning that they had to be cooled using liquid helium, which is expensive and difficult to handle. In the 1980s, so-called high-temperature superconductors were discovered, allowing the use of liquid nitrogen instead of helium. Today, superconductors with critical temperatures as 'high' as 150 K (-123 C) have been developed.

Image Details

Artist
 
Image Ref.
 
10309934

© Science Museum / Science & Society Picture Library

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