Dresden 2014 – scientific programme

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KR: Fachgruppe Kristallographie

KR 9: Recent Developments in X-ray Diffraction

KR 9.2: Talk

Thursday, April 3, 2014, 10:30–10:45, CHE 184

Beam Conditioning in Cutting Edge X-ray Analytical Equipment — •Jörg Wiesmann, André Beerlink, Andreas Kleine, Jürgen Graf, Frank Hertlein, and Carsten Michaelsen — Incoatec GmbH, Geesthacht

Nowadays, X-ray optical components, such as multilayer mirrors or scatterless apertures, are used as beam conditioning devices in nearly all state-of-the-art X-ray analytical equipment.

Scatterless apertures, such as the scatterfree pinholes SCATEX, are usually made of oriented single crystals, and enable a beam conditioning that is free of parasitic scattering commonly associated with conventional metal apertures. Therefore, such pinholes allow a significant improvement of small angle scattering instruments as the number of necessary pinholes can be reduced while simultaneously enlarging the beam defining pinhole size. This leads to an increased flux on the sample.

Multilayer X-ray mirrors are widely used as monochromators and beam shaping devices in protein and small molecule crystallography. Beam shaping with multilayer mirrors includes the optimization of the flux on the sample and the control over the beam shape and divergence.

In this contribution, we will give an overview of current developments in multilayer optics and scatterless beam components, showing their benefit for typical applications in combination with high-brightness microfocus X-ray sources. We will be presenting selected results for protein crystallography and small angle scattering obtained with the METALJET X-ray source.