Coherent X-ray Scattering Group (CXS)The Coherent X-ray Scattering (CXS) group develops techniques in scanning- and time-resolved SAXS and high-resolution scanning X-ray microscopy at the cSAXS beamline. In collaboration with research groups, within PSI and international universities and research institutes, we apply these techniques to a wide range of problems in the fields of biology, biomedical research and materials science.
We have an open position at cSAXS for fluorescence tomography in combination with ptychographic tomography, click here for details.
Scientific Highlights 2019
A method developed by PSI researchers makes X-ray images of materials even better. The researchers took a number of individual images while moving an optical lens. From these, with the help of computer algorithms, they generated one overall image.
Scientific Highlights 2018
Helping chemists to understand degradation and stabilization of catalytic nanoporous gold structuresIt is difficult for X-rays to compete in spatial resolution with electrons, but they can probe relatively large bulk sample volumes at atmospheric pressure in a non-destructive manner. This makes X-ray tomography a promising tool to investigate catalytic nanoporous materials under real operating conditions. In this work researchers from Karlsruhe Institute of Technology and the University of Bremen in Germany compared X-ray ptychographic tomography, electron tomography and focused ion beam-scanning electron microscopy performed on a nanoporous sponge-like gold material with numerous applications, including selective oxidation and sustainable production of chemicals. As it turns out, the X-ray based method is the most suitable for in situ or sequential post-mortem analysis of volumes after thermal annealing, which researchers want to pursue in the future.
Claire Donnelly dissertation research awardsClaire Donnelly, Mesoscopic Systems (ETH Zurich - PSI), was awarded the COMSOL SPS Award in Computational Physics, the Werner Meyer-Ilse Memorial Award, the ETH Medal for an outstanding doctoral thesis, and the American Physical Society Richard L. Greene Dissertation Award. These awards recognize the exceptional quality and importance of her dissertation on “Hard X-ray Tomography of Three Dimensional Magnetic Structures”, carried out in collaboration with Sebastian Gliga, the CXS group, and the OMNY project. Experiments have been carried out at the cSAXS beamline. She will continue her research at the University of Cambridge with a Leverhulme Fellowship supported by the Newton Trust. We wish her every success! - Image courtesy of the APS.
Scientific Highlights 2017
For the first time, scientists have made visible the directions of the magnetisation inside a 3D magnetic object. The smallest details in their visualisation were ten thousand times smaller than a millimetre. Among others, the magnetic structure contained one outstanding kind of pattern: magnetic singularities called Bloch points, which up to now were only known in theory.
Researchers at the PSI have made detailed 3-D X-ray images of a commercially available computer chip. In their experiment, they examined a small piece that they had cut out of the chip beforehand. This sample remained undamaged throughout the measurement. It is a major challenge for manufacturers to determine if, in the end, the structure of their chips conforms to the specifications. Thus these results represent one important application of an X-ray tomography method that the PSI researchers have been developing for several years.