Letter | Published:

The Arc Cathode


IT is generally agreed that none of the theories that has been suggested gives a complete and convincing account of the mechanism of the non-thermionic arc cathode. Combinations of, say, thermal and field emission do not fare much better, particularly for cases like the mercury arc cathode1. What follows is a new approach which goes some way, if not all the way, towards a satisfactory theory.

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  1. 1

    Lee, T. H., J. App. Phys., 28, 920 (1957).

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