@inproceedings{fc0da847ef6842f580f98526f8f2f9a7,
title = "Thermionic cathodes studied by low-energy ion scattering spectroscopy",
abstract = "Low energy ion scattering (LEIS) is used to study the surface-composition and structure of B-type dispenser cathodes. Measurements between room temperature and 1150°C gave identical results, which shows that the surface structure of Ba and O on the cathodes is not dependent on temperature. The results rule out any structure with O in the outermost layer (at the same height or above Ba). On cathodes poisoned by oxygen we found that the results are in agreement with a model where O is positioned on top of the Ba. In addition we demonstrate how LEIS may be used to determine the sputter yield of Ba from a cathode by Ar+ ions by monitoring the Ba coverage as a function of ion dose.",
author = "{Denier van der Gon}, A.W. and M.F.F.K. Jongen and H.H. Brongersma and {Slooten, van}, U. and A. Manenschijn",
year = "1997",
doi = "10.1016/S0169-4332%2896%2900694-0",
language = "English",
series = "Applied Surface Science",
pages = "64--69",
booktitle = "IVESC '96 : proceedings of the international vacuum electron sources conference 1996, Eindhoven, The Netherlands, July 1-4, 1996",
}