Publications by authors named "L Le Guyarder"
The SASE3 soft X-ray beamline at the European XFEL has been designed and built to provide experiments with a pink or monochromatic beam in the photon energy range 250-3000 eV. Here, the focus is monochromatic operation of the SASE3 beamline, and the design and performance of the SASE3 grating monochromator are reported. The unique capability of a free-electron laser source to produce short femtosecond pulses of a high degree of coherence challenges the monochromator design by demanding control of both photon energy and temporal resolution.
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- Topological states of matter are intriguing due to their unique physics and stability, but creating these states quickly is challenging.
- Researchers demonstrated the rapid emergence of a topological phase with multiple magnetic skyrmions within picoseconds, using real-time soft X-ray scattering after activating with infrared laser.
- A transient topological fluctuation state, influenced by a specific magnetic field, helps lower the energy barrier for this rapid formation, offering insights into topological transitions and potential for ultrafast switching in various materials.