Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.50: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
Ion Beam Characterisation with Graphene — •Igor Zagoranskiy, Roland Kozubek, Oliver Ochedowski, and Marika Schleberger — Universität Duisburg-Essen, Duisburg, Deutschland
In ion irradiation experiments material modifications due to ion impacts are often studied as a function of fluence. A precise knowledge of the beam homogeneity and the spot size of the beam is therefore of utmost importance for the experiment. While the spot size analysis can be performed using a Faraday cup, the homgeneity has to be determined using a spatially resolving detector. These detectors are expensive and not applicable for every experimental setup. In our contribution we demonstrate that CVD graphene in combination with µ-Raman spectroscopy mapping can be applied as an ion beam detector which can be used to determine the fluence and beam homogeneity on the micron scale.
As an example we present data from an experiment where we irradiated a CVD graphene sample with an ion beam of highly charged Xe35+ particles (260 keV). By analysing the D-band originating from the ion induced defects, the beam homogeneity, spot size and the actual size of the ion-induced defects can be determined.