Thermal Emission of Alkali Ion Pulses from Clean and Oxygenated Tungsten
- 1 May 1960
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 31 (5) , 876-879
- https://doi.org/10.1063/1.1735711
Abstract
The spontaneous emission of positive ions from a heated tungsten filament occurs as pulses, a single pulse releasing as many as 106 ions in less than 100 μsec. The pulses are composed mainly of potassium ions, present as impurities in the tungsten lattice. It is suggested that the emission of positive ions in the form of bursts is dependent upon the existence of edge dislocations in the metal. At temperatures where the formation of an adsorbed layer is possible, oxygen has a very pronounced effect upon the rate of emission of positive ion pulses.This publication has 9 references indexed in Scilit:
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