Definition of thermionic emission in US English:

thermionic emission


  • The emission of electrons from a heated source.

    • ‘The gas, primarily consisting of cathode material, expands into the vacuum where it is ionised by bombardment from the thermionic emission due to the very hot underlying cathode.’
    • ‘After graduating, he began a research project in the Cavendish Laboratory on thermionic emission but it appears not to have gone too well and he gave up the project.’
    • ‘In these studies, we used the thermionic emission of purified laser-vaporization-produced single-walled nanotubes to experimentally measure their work function.’
    • ‘However, Carnap's principal interest at that time was in physics, and by 1913 he was planning to write his dissertation on thermionic emission.’