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Optimal laser positioning for laser-assisted atom probe tomography
KTH, School of Computer Science and Communication (CSC), Computational Biology, CB.
2013 (English)In: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 132, 70-74 p.Article in journal (Refereed) Published
Abstract [en]

Laser-assisted atom probe tomography is a material analysis method based on field evaporating ions from a tip-shaped sample by a combination of a standing electric held and a short (pico- or lemtosecond) laser pulse. The laser-pulse thereby acts as a starting signal for a time-of-flight mass analysis of the ions whereby the thermal energy deposited in the tip by the laser pulse temporarily enables the evaporation of ions from the surface of the tip. Here we will use simulations of the laser absorption on a silicon tip to find the optimal position of the laser spot in order to maximize the mass resolution achieved during the experiments. We will confirm our simulations by showing that the experimentally observed mass resolution indeed changes as predicted by the simulations.

Place, publisher, year, edition, pages
2013. Vol. 132, 70-74 p.
Keyword [en]
Laser-assisted atom probe, Laser-tip interaction, Silicon
National Category
Bioinformatics (Computational Biology)
Identifiers
URN: urn:nbn:se:kth:diva-131236DOI: 10.1016/j.ultramic.2013.03.003ISI: 000324235500013Scopus ID: 2-s2.0-84883818388OAI: oai:DiVA.org:kth-131236DiVA: diva2:655400
Note

QC 20131011

Available from: 2013-10-11 Created: 2013-10-10 Last updated: 2017-12-06Bibliographically approved

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Innocenti, Nicolas
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