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. ; MuÌˆller, G.

Author_Institution

Helmholtz-Zentrum Berlin fur Mater. und Energie GmbH, Berlin, Germany

fYear

2014

fDate

June 30 2014-July 4 2014

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference (IVESC), 2014 Tenth International

Conference_Location

St. Petersburg

Print_ISBN

978-1-4799-5770-5

Type

conf

DOI

10.1109/IVESC.2014.6891948

Filename

6891948