Regensburg 2010 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 34: Posters: New Technologies
BP 34.2: Poster
Donnerstag, 25. März 2010, 17:15–20:00, Poster B2
BioRef - a time-of-flight reflectometer for soft matter applications at HZB — •Markus Strobl1,2, Roland Steitz2, Martin Kreuzer1,2, Reiner Dahint1, and Michael Grunze1 — 1Universität Heidelberg — 2Helmholtz Zentrum Berlin
BioRef, a time-of-flight reflectometer at Helmholtz Zentrum Berlin (HZB) is currently under construction. Combined with an in-situ infrared spectrometer it will be optimised for soft matter applications at solid-liquid interfaces. A flexible double-chopper set-up together with a wavelength band chopper will enable the selection of well defined wavelength bands at different defined wavelength resolutions in order to optimize measurements with regard to the given application [1]. A state-of-the-art 2D position sensitive 3He detector will be used for the reflectivity measurements in horizontal scattering geometry. The time-of-flight mode is also chosen to realise the investigation of dynamic interface processes under shear and flow conditions. A choice of different wavelength bandwidths with at the same time constant wavelength resolution enables to focus on defined features in the reflection curve depending on the requirements of the specific measurements utilizing the highest possible efficiency. A q-range spanning 3 orders of magnitude and reflectivity measurements over more than 6 orders of magnitude are envisaged and their feasibility is supported by Monte Carlo simulations [2].