Title :
17.2: Ab initio models of dispenser B-type, scandate, and alloy cathode surfaces
Author :
Vlahos, Vasilios ; Morgan, Dane ; Booske, John H.
Author_Institution :
Interdiscipl. Mater. Sci., Univ. of Wisconsin-Madison, Madison, WI, USA
Abstract :
The work function (Φ) and operating stability of dispenser, scandate, and alloy cathodes are investigated with ab initio quantum mechanical modeling. Low Φ, thermodynamically stable, and steady state surface configurations are identified, while the ability of alloy surfaces to improve emission is presented.
Keywords :
cathodes; electrochemical electrodes; quantum theory; work function; ab initio quantum mechanical modeling; alloy cathode surfaces; alloy cathodes; dispensers; scandates; steady state surface configurations; thermodynamic stability; work function; Atomic layer deposition; Barium; Cathodes; Chemicals; Coatings; Materials science and technology; Quantum mechanics; Stability; Surface structures; Temperature; ab initio modeling; scandate; work function;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503436
