DocumentCode :
2924607
Title :
Hafnium carbide thermal sources in O2, CO and CO2 environments
Author :
Lovell, Josh M. ; Mackie, William A. ; Magera, Gerald G.
Author_Institution :
Appl. Phys. Technol., Inc., McMinnville, OR, USA
fYear :
2012
fDate :
24-26 April 2012
Firstpage :
303
Lastpage :
304
Abstract :
We have tested thermionic cathodes using (210) and (310) oriented hafnium carbide. These have been operated in UHV, and pressures of oxygen, CO2 and CO to 5 × 10-5 Torr. Emission data show slight initial improvements due to work function lowering. Relatively stable operation at 1900 K in oxygen or CO2 at 1 × 10-6 Torr is reported.
Keywords :
carbon compounds; electron emission; hafnium compounds; thermionic cathodes; CO2; HfC; UHV; electron emission data; hafnium carbide thermal sources; temperature 1900 K; thermionic cathodes; work function lowering; Cathodes; Crystals; Hafnium; Hybrid fiber coaxial cables; Temperature measurement; carbide; electron source; hafnium carbide; thermionic cathode;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0368-2
Type :
conf
DOI :
10.1109/IVESC.2012.6264183
Filename :
6264183
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=2924607
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