A5043110423- Advanced Electron Microscopy Techniques and Applications
- Advanced X-ray Imaging Techniques
- Magnetic properties of thin films
- Crystallography and Radiation Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Laser-Plasma Interactions and Diagnostics
- Advanced Antenna and Metasurface Technologies
- Chemical Synthesis and Characterization
- Microwave Engineering and Waveguides
- Near-Field Optical Microscopy
- Magneto-Optical Properties and Applications
- Civil and Structural Engineering Research
- Soil Moisture and Remote Sensing
Universität Hamburg
2017-2022
Karlsruhe Institute of Technology
1990-2015
We present a systematic 2D spatial-coherence analysis of the soft-X-ray beamline P04 at PETRA III for various configurations. The influence two different beam-defining apertures on spatial coherence properties beam is discussed and optimal conditions coherence-based experiments are found. A significant degradation in vertical direction has been measured sources this identified discussed. Fourier-analysis method, which gives fast simple access to function X-ray beam, used experiment. Here, we...
Abstract The availability of sub 100 fs short and highly intense free-electron laser (FEL) pulses allows for new insights in laser-induced ultrafast demagnetization (LID) ferromagnetic thin films on nanometer length scales. We designed a pair in-vacuum Helmholtz coils, providing pulsed magnetic fields up to µ 0 H z = ±45 mT, time-resolved experiments at FEL sources transmission geometry. report the implementation coils an optical-pump–resonant-magnetic-scattering (tr-XRMS) experiment FERMI...
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Abstract Ultrashort and intense extreme ultraviolet (XUV) X-ray pulses readily available at free-electron lasers (FELs) enable studying non-linear light−matter interactions on femtosecond timescales. Here, we report the fluence dependence of magnetic scattering Co/Pt multilayers, using FERMI FEL’s 70-fs-long single double XUV pulses, latter with a temporal separation 200 fs, photon energy slightly detuned to Co M2,3 absorption edge. We observe quenching in that sets-in already...
Direct 2D spatial-coherence measurements are increasingly gaining importance at synchrotron beamlines, especially due to present and future upgrades of facilities diffraction-limited storage rings. We a method determine the spatial coherence radiation in direct particularly simple way by using Fourier-analysis conjunction with curved gratings. photon-beam monitoring provided grating circumvents otherwise necessary separate determination illuminating intensity distribution required for...