In Situ Emission Microscopy of Scandium/Scandium-Oxide and Barium/Barium-Oxide Thin Films on Tungsten

In Situ Emission Microscopy of Scandium/Scandium-Oxide and Barium/Barium-Oxide Thin Films on Tungsten

The effect of a thin Sc/Sc-oxide base layer on Ba/Ba-oxide electron emission, surface diffusion, adsorption, and desorption on W is studied using photoelectron emission microscopy and thermionic emission microscopy. A barium-on-scandium structure enhances both photo- and thermionic electron emission...

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Veröffentlicht in:IEEE transactions on electron devices 2009-05, Vol.56 (5), p.794-798
Hauptverfasser: Vaughn, J.M., Jamison, K.D., Kordesch, M.E.
Format: Artikel
Sprache:eng
Schlagworte:
Barium
Cathodes
Desorption
Electron emission
Emission microscopy
Heating
Metals
Microscopy
Photoelectron emission microscopy (PEEM)
scandate cathode
Scandium
Surface chemistry
thermionic cathode
thermionic emission microscopy (ThEEM)
Thermionics
Thin films
Titanium
Tungsten
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Beschreibung
Zusammenfassung:The effect of a thin Sc/Sc-oxide base layer on Ba/Ba-oxide electron emission, surface diffusion, adsorption, and desorption on W is studied using photoelectron emission microscopy and thermionic emission microscopy. A barium-on-scandium structure enhances both photo- and thermionic electron emission.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2009.2015410