Oxidation studies of impregnated dispenser cathodes

Journal Article · Wed Dec 01 00:00:00 EST 1982 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.330410· OSTI ID:6616659

Hecht, M H; Lindau, I; Chen, D S

We report on surface studies of the type M and type S impregnated dispenser cathode using synchrotron radiation photoemission spectroscopy. The results indicate the presence of two barium configurations on the room temperature type S surface, probably barium metal and BaO. The room-temperature type M cathode has about a monolayer of barium metal and about a monolayer of tungsten, apparently alloyed to the Os/Ru coating, on the surface. The barium-related features of the type S cathode are extremely sensitive to small oxygen exposures, while the tungsten-related features are more sensitive to oxygen in the type M cathode.

• Research Organization: Stanford Electronics Labs, Stanford University, Stanford, CA 94305
• OSTI ID: 6616659
• Journal Information: J. Appl. Phys.; (United States), Vol. 53:12
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATHODES
SURFACE PROPERTIES
BARIUM
BARIUM OXIDES
METALS
OSMIUM
OXIDATION
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
RUTHENIUM
SENSITIVITY
SYNCHROTRON RADIATION
TUNGSTEN
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BARIUM COMPOUNDS
BREMSSTRAHLUNG
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
EMISSION
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RADIATIONS
SECONDARY EMISSION
SPECTROSCOPY
TRANSITION ELEMENTS
360603* - Materials- Properties