Transmission electron microscope cathode. Coloured scanning electron micrograph (SEM) of a damaged cathode from an old transmission electron microscop

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Transmission electron microscope cathode. Coloured scanning electron micrograph (SEM) of a damaged cathode from an old transmission electron microscope. The cathode, or electron gun, is a component that produces the electron beams used by the transmission electron microscope. This cathode contains lanthanum hexaboride (LaB6), an inorganic ceramic material that has a very low work function, which means that it takes very little energy to initiate an electron flow from its surface. This cathode has burnt out and needs to be replaced.

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Size: 5079px × 3452px
Photo credit: © MICROSCOPY AUSTRALIA, UNIVERSITY OF SYDNEY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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