Beamlines

The electrons inside the 2300-metre-long storage ring PETRA are accelerated to almost the speed of light, producing high-intensity X-rays in the process. The light travels down tubes to the individual measuring stations, where researchers use it to study a wide variety of samples.

Four large experimental halls will be located around the 2300-metre-long PETRA IV storage ring. In these halls, the synchrotron radiation will be guided through beamlines to the measuring stations. In total, up to 35 beamlines will be built for PETRA IV. The measuring stations offer optimal experimental conditions for very different research and development projects. Some measuring stations are specialised in the analysis of biomolecules, others in the investigation of new high-tech materials. Still others enable the precise investigation of nanomaterials or minerals from the Earth’s interior.

A researcher works at a measuring station.
View of an experimental station at DESY’s existing X-ray source PETRA III. At this beamline, researchers discovered candidates for active ingredients against Covid-19. Image: DESY, C. Schmid

Powerful and precise: the new beamlines

The new possibilities of PETRA IV are used at about 35 beamlines. The following list describes nine of these beamlines in more detail.

This beamline will generate high-energy X-rays that can penetrate particularly deep inside material samples. This will make it possible, for example, to observe in detail how a battery charges and discharges. Such findings could lead to storage materials with a longer-lasting performance.

Here, matter can be studied under extreme conditions, especially at high pressures and temperatures. Among other things, this will allow the production of new, diamond-like materials that exhibit extraordinary mechanical properties.

This will allow processes to be observed in disordered materials, such as plastics or biological cells. As a result, it will be possible to analyse, for example, the role of water molecules in the folding of protein molecules or what happens when a material corrodes.

Using a special robot, samples of materials can be switched automatically, leading to a high sample throughput. This will result in a particularly effective utilisation. The range of research will also be extremely broad. A wide variety of substances can be studied in detail, from new types of solar cells to biological samples and micrometeorites.

Here, samples can be scanned by the fine X-ray beam with pinpoint accuracy, sometimes even with nanometre precision. This will produce high-resolution images containing a great deal of physical information. Among other things, high-tech materials and novel superconductors for quantum technologies can be studied, but also rock samples from comets and asteroids.

This is specialised in the study of biological systems. It will enable trace elements, such as potassium or calcium, to be detected in organisms and the target sites of anti-cancer drugs to be identified. In addition, this beamline will allow extremely high-resolution 3D images to be produced, on which it may even be possible to recognise the orientation of individual biomolecules inside a cell.

Here, the crystal structure of a sample can be analysed selectively and in great detail. This will make it possible to visualise how and where exactly the crystal lattice in a battery electrode can become so bloated as to suffer damage. This would allow more sustainable batteries to be developed.

Among other things, this beamline will allow the electronic and magnetic properties of a sample to be scanned with very high precision as a function of position. This can be useful, for example, in developing highly sensitive magnetic sensors.

This beamline will analyse the electrons that are emitted from a sample when it is illuminated with X-rays. This will allow the electronic properties of semiconductors and novel quantum materials to be measured with extremely high precision. Precise scanning will also allow electronic components to be examined in great detail.

Christina Krywka talking to a colleague.

X-ray screening for materials

A new, visionary method for materials science

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Further research topics

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