Title :
Influence of oxides on the field emission of molybdenum
Author :
Barday, R. ; Jankowiak, A. ; Kamps, T. ; Klimm, C. ; Knobloch, Jan ; Siewert, F. ; Varykhalov, A. ; Senkovskiy, B. ; Lagotzky, S. ; Müller, G.
Author_Institution :
Helmholtz-Zentrum Berlin fur Mater. und Energie GmbH, Berlin, Germany
fDate :
June 30 2014-July 4 2014
Abstract :
Molybdenum is widely used in fundamental research and industry, for example as substrate for photocathodes or electrode material in DC photoelectron guns. Usually, Mo is heated in situ to several hundred degrees to achieve an oxygen free surface for the photocathode deposition or to reduce the surface outgassing rate in the electron gun. Since enhanced field emission (EFE) is often observed there, we have investigated the influence of oxides on the EFE of Mo by means of a field emission scanning microscope (FESM) and x-ray photoelectron spectroscopy (XPS).
Keywords :
X-ray photoelectron spectra; electrodes; electron guns; field emission; field emission electron microscopy; molybdenum; outgassing; scanning electron microscopy; DC photoelectron guns; FESEM; Mo; X-ray photoelectron spectroscopy; XPS; electrode material; enhanced field emission; field emission scanning electron microscopy; molybdenum; outgassing rate; oxygen free surface; photocathodes; Cathodes; Heating; Industries; Substrates; Surface treatment; Temperature measurement;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2014 Tenth International
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4799-5770-5
DOI :
10.1109/IVESC.2014.6891948
