Controlled-Porosity Cathodes for High-Current-Density Applications

Controlled-Porosity Cathodes for High-Current-Density Applications

Controlled-porosity reservoir cathodes that can operate at high current densities with long lifetimes are described. The fabrication process is economical and adaptable to high volume production. The cathodes exhibit superior performance over sintered powdered tungsten cathodes. This paper describes...

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Veröffentlicht in:IEEE transactions on plasma science 2010-06, Vol.38 (6), p.1345-1353
Hauptverfasser: Ives, R Lawrence, Falce, Louis R, Miram, George, Collins, George
Format: Artikel
Sprache:eng
Schlagworte:
Acceleration
Aluminum oxide
Barium
Calcium
Cathodes
Chemical elements
controlled porosity
Density
dispenser cathode
Dispensers
Economics
Electrodes
Electron beams
electron guns
Fabrication
High current
Plasma
Radio frequency
Reservoirs
Sintering
Tungsten
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Beschreibung
Zusammenfassung:Controlled-porosity reservoir cathodes that can operate at high current densities with long lifetimes are described. The fabrication process is economical and adaptable to high volume production. The cathodes exhibit superior performance over sintered powdered tungsten cathodes. This paper describes the fabrication, presents measured performance, and compares the results with conventional dispenser cathodes.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2010.2046427