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Erschienen in:
1963 | OriginalPaper | Buchkapitel
The series resistance and emission from several types of dispenser cathodes
verfasst von : H. Ahmed, A. H. W. Beck
Erschienen in: Microwaves
Verlag: Macmillan Education UK
Enthalten in: Professional Book Archive
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The impedance associated with oxide cathodes under active conditions is well known. Values as high as 100 Ω/cm2are reported. The impedance usually consists of the direct resistance of the oxide layer and a contribution from the interface and its capacity. The impedance is known to change with time, particularly when the valve is operated in the cut-off state. In this paper the resistance of dispenser cathodes is measured.