Dmitri Svergun's testimonial on Xenocs scatterless slits

September 6, 2013

Dr Dmitri Svergun
European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Germany

Scatterless slits from Xenocs have been installed on the BioSAXS beamline P12 of the European Molecular Biology Laboratory (EMBL) led by Dr Dmitri Svergun, at the PETRA III storage ring at DESY (Deutsches Elektronen-Synchrotron) in Hamburg.

The slits are made of four independently motorized blades, which allows a fast and easy change of beam size and a very clean beam shape definition. Xenocs scatterless blades reduce scattering dramatically. They can be used for a wide energy range, i.e. from Cu kα to Mo kα [8 – 17keV] energies.

The slits installed in June 2013 with the aim of reducing parasitic background have fully met Dr Svergun’s expectations :

“We installed the Xenocs scatterless slits at the new high brilliance beamline P12 on Petra III storage ring.

The slits allowed us to reduce the parasitic scattering around the beamstop by over a factor of five compared to the standard highly polished slits. Having a low background with minimal loss of the beam intensity is extremely important for the biological solution scattering experiments.

Moreover, the scatterless slits now permit us to rapidly change the aperture size while tailoring the experiments with micron-sized beams. We are therefore very happy with the performance and capabilities of the scatterless slits.”

The Xenocs scatterless slits have been installed in most synchrotrons worldwide. This technology is fully integrated in the SAXS equipment Xeuss and contributes to the system unique performance.

For more information on Xenocs scatterless slits, please contact us at

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