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Scientific Highlights

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Datum
15 October 2020
Antognin PRL 2

Demonstration of Muon-Beam Transverse Phase-Space Compression

We demonstrate efficient transverse compression of a 12.5 MeV=c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was reduced to a 0.25 mm size (rms) within 3.5 μs. The simulation including cross sections ...

 

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14 October 2020
ASR

Refined diagnosis of the “concrete disease”

When bridges, dam walls and other structures made of concrete (cement and aggregates such as sand/gravel) are marked by map-like cracks after a few decades, the diagnosis is ASR (alkali-silica Reaction), in popular science terms also called “concrete disease or concrete cancer”.  The ASR-induced microscale crack initiation can hardly be modelled, mainly due to our limited knowledge of the structure and property of the ASR products. Using X-ray absorption micro-spectroscopy at the PHOENIX beamline of the Swiss Light Source (SLS) allowed a refined diagnosis of ASR products by providing new insights into the crystallinity and structure of ASR products with micro-scale resolution.

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8 October 2020
NCM Full Cells

Improved Interfacial Stability of Ni-rich Oxide Full-Cells

PSI researchers have identified a novel electrolyte additive, allowing extended voltage range of Ni-rich oxide full-cells, while keeping excellent performance. The instability of cathode–electrolyte interface causes the structural degradation of cathode active material and the electrolyte consumption, resulting in a rapid capacity fading and shortening battery life-time. The PSI-identified additive help to alleviate these problems and extend battery life-time.

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7 October 2020
Pip Small

Electroless Deposition of Ni–Fe Alloys on Scaffolds for 3D Nanomagnetism

3D magnetic nanostructures are of great interest due to the possibility to design novel properties and the benefits for both technological applications such as high-density data storage, as well as more fundamental studies.
One of the main challenges facing the realization of these three-dimensional systems is their fabrication, which includes the deposition of magnetic materials on 3D surfaces. In this work, the electroless deposition of Ni–Fe
on a 3D-printed, non-conductive microstructure is presented.

 

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30 September 2020
Two-color, twin-focus zone plate

Two-color snapshots of ultrafast charge and spin dynamics

In a joint research effort, an international team of scientists lead by Emmanuelle Jal (Sorbonne Université) performed a time-resolved experiment at the FERMI free-electron laser to disclose the dynamic behavior of two magnetic element of a compount material in only one snapshot. The X-ray Optics and Applications group developed a dedicated optical element for this experiment that is usable with two different photon energies (colors) simultaneously.

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29 September 2020

PSI - member of the Microsoft Quantum Network

The PSD is a research partner in the Microsoft Quantum Network, which is a broad community of individuals and organizations collaborating with Microsoft to advance a comprehensive quantum ecosystem, develop practical solutions, and build a robust quantum workforce.

The institutions of scientific excellence are partnering collaboratively with Microsoft to pursue the advancement of quantum computing research, development, and education. The large scale facilities at PSI, in particular the Swiss Light Source, offers unique characterizations techniques to shed light on the secrets of functional materials.

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29 September 2020
spin_cascade_and_doming_in_ferric_hemes.jpg

Spin cascade and doming in ferric hemes

In biology, structure and function are closely interwoven. A case in point is oxygen transport in the lungs, which relies on ferrous heme proteins adopting dome-like shapes.

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28 September 2020
Novel Optics

Novel optics enable better X-ray Free Electron Laser experiments

Our research on multifocus off-axis zone plates was accepted in “Optica”, the highest impact journal of the Optical Society of America. In the paper we report on different ways to combine focusing and beam-splitting functionalities in one single optical element.

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25 September 2020
First light at Maloja endstation

First light in the SwissFEL Maloja endstation

The first endstation at the SwissFEL Athos soft X-ray branch is rapidly developing and on track for first experiments in 2021.

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25 September 2020
Kanazawa PRL

Direct Observation of the Statics and Dynamics of Emergent Magnetic Monopoles in a Chiral Magnet

In the three-dimensional (3D) Heisenberg model, topological point defects known as spin hedgehogs behave as emergent magnetic monopoles, i.e., quantized sources and sinks of gauge fields that couple strongly to conduction electrons, and cause unconventional transport responses such as the gigantic Hall effect. We observe a dramatic change in the Hall effect upon the transformation of a spin hedgehog crystal in a chiral magnet MnGe through combined measurements of magnetotransport and small-angle neutron scattering (SANS).

 

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PSI Scientific Reports

Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.

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