Change search
ReferencesLink to record
Permanent link

Direct link
Reduction of multiple hits in atom probe tomography
Chalmers University of Technology, Göteborg, Sweden.
Chalmers University of Technology, Göteborg, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Chalmers University of Technology, Göteborg, Sweden.
Show others and affiliations
2013 (English)In: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 132, 81-85 p.Article in journal (Refereed) Published
Abstract [en]

The accuracy of compositional measurements using atom probe tomography is often reduced because some ions are not recorded when several ions hit the detector in close proximity to each other and within a very short time span. In some cases, for example in analysis of carbides, the multiple hits result in a preferential loss of certain elements, namely those elements that frequently field evaporate in bursts or as dissociating molecules. In this paper a method of reducing the effect of multiple hits is explored. A fine metal grid was mounted a few millimeters behind the local electrode, effectively functioning as a filter. This resulted in a decrease in the overall detection efficiency, from 37% to about 5%, but also in a decrease in the fraction of multiple hits. In an analysis of tungsten carbide the fraction of ions originating from multiple hits decreased from 46% to 10%. As a result, the measured carbon concentration increased from 48.2 at%to 49.8 at%, very close to the expected 50.0 at%. The characteristics of the multiple hits were compared for analyses with and without the grid filter.

Place, publisher, year, edition, pages
Elsevier , 2013. Vol. 132, 81-85 p.
Keyword [en]
Atom probe tomography, Multiple hits, Detection efficiency, Quantification, Carbides, Tungsten carbide
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-98667DOI: 10.1016/j.ultramic.2012.12.005ISI: 000324235500015OAI: diva2:655266
Available from: 2013-10-10 Created: 2013-10-10 Last updated: 2013-10-15

Open Access in DiVA

fulltext(328 kB)311 downloads
File information
File name FULLTEXT01.pdfFile size 328 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Johnson, Lars
By organisation
Thin Film PhysicsThe Institute of Technology
In the same journal
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 311 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 71 hits
ReferencesLink to record
Permanent link

Direct link