Oxidation studies of impregnated dispenser cathodes

Journal Article · Wed Dec 01 04:00:00 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), Journal Name: J. Appl. Phys.; (United States) Vol. 53:12; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

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