Performance of Tungsten wire reservoir cathodes

Performance of Tungsten wire reservoir cathodes

Research is continuing on development of controlled porosity cathodes capable of very long life times. Tungsten wires are sintered to form a material consisting of a uniform pattern of pores to transport barium from a reservoir. The combination of uniform pores and the reservoir results in very unif...

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Bibliographische Detailangaben
Hauptverfasser: Ives, L., Falce, L., Collins, G., Marsden, D., Miram, G., Gunther, K., Curtis, M., Schwartzkopf, S., Smith, B., Witherspoon, R.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Barium
Calcium
cathode
Cathodes
controlled porosity
Current density
electron gun
Fabrication
Powders
Reservoirs
Temperature
Tungsten
Wire
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Beschreibung
Zusammenfassung:Research is continuing on development of controlled porosity cathodes capable of very long life times. Tungsten wires are sintered to form a material consisting of a uniform pattern of pores to transport barium from a reservoir. The combination of uniform pores and the reservoir results in very uniform current emission from the surface with extremely long life. The barium diffusion rate can be controlled by the designer.
DOI:10.1109/IVELEC.2009.5193464