A5026642527- Advanced X-ray Imaging Techniques
- Hydrogen Storage and Materials
- Particle Accelerators and Free-Electron Lasers
- Magnetic properties of thin films
- X-ray Spectroscopy and Fluorescence Analysis
- Magneto-Optical Properties and Applications
- Hybrid Renewable Energy Systems
- Nuclear Materials and Properties
- Inorganic Fluorides and Related Compounds
- Phase-change materials and chalcogenides
- Metal-Organic Frameworks: Synthesis and Applications
- Thermodynamic and Structural Properties of Metals and Alloys
- Laser-Matter Interactions and Applications
- Superconductivity in MgB2 and Alloys
- Spacecraft and Cryogenic Technologies
- Crystallography and Radiation Phenomena
- Astrophysical Phenomena and Observations
- Laser-Plasma Interactions and Diagnostics
- Advanced X-ray and CT Imaging
- Advanced Electron Microscopy Techniques and Applications
- Advancements in Photolithography Techniques
Deutsches Elektronen-Synchrotron DESY
2022
Korea Atomic Energy Research Institute
2014-2019
Ernst Ruska Centre
2018
In this work, single-shot ptychography was adapted to the XUV range and, as a proof of concept, performed at free-electron laser FLASH DESY obtain high-resolution reconstruction test sample. Ptychography is coherent diffraction imaging technique capable extended samples with diffraction-limited resolution. However, its scanning nature makes time-consuming and also prevents application for mapping dynamical processes. Single-shot can be realized by collecting patterns multiple overlapping...
All-optical switching (AOS) of magnetization in ferri- and ferromagnetic thin films has recent years attracted a strong interest since it allows reversal the absence applied magnetic field. Here we investigate AOS ${[\mathrm{Co}/\mathrm{Pt}]}_{N}$ multilayers. The coercivity (${H}_{C}$) multilayers was tuned either by varying bilayer repetition number ($N$) or sample temperature ($T$). During experiments, first illuminated sequence femtosecond laser pulses with fluence, light polarization,...
Recent research on hydrogen storage in metal–organic frameworks focuses how to achieve increased binding energies by using doped metal, unsaturated metal ions, or forming composites comprising Pt-doped carbon materials. In particular, noticeable progress MOFs and carbons has been achieved enhance the capacity near room temperature. A three-component composite material, Pt-MWCNT-MOF5 (PMM5), which is a framework (MOF-5) hybridized with Pt nanoparticles multiwalled nanotubes (MWCNT), stores...
We studied femtosecond spin dynamics in ${\mathrm{Ni}}_{x}{\mathrm{Pd}}_{1\ensuremath{-}x}$ magnetic thin films by optically pumping the system with infrared (1.55 eV) laser pulses and subsequently recording reflectivity of extreme ultraviolet (XUV) synchronized pump pulse train. XUV light energy range from 20 to 72 eV was produced high-harmonic generation. The radiation at characteristic resonant energies allowed separate detection elemental subsystems ${M}_{2,3}$ absorption edges Ni (68.0...
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen first user experiments: ptychography free-electron laser, holographic imaging storage ring and preliminary tests on correlation spectroscopy. performed remarkably well terms of spatial resolution achievable sample plane, owing to small pixel size, large active area very dynamic range; but also frame rate, which significantly faster...
Abstract Ptychograhy is a scanning coherent diffraction imaging technique capable of providing images extended samples with diffraction-limited resolution. However, ptychography experiments are time-consuming due to their nature which also prevents use for dynamical processes. Recently, setups based on two con-focal lenses were proposed perform single-shot in the visible regime by measuring pattern produced multiple overlapping beams one shot. this approach cannot be straightforwardly X-ray...
Polyethylene terephthalate (PET) is a thermoplastic polyester with numerous applications in industry. However, it requires surface modification on an industrial scale for printing and coating processes plasma treatment one of the most commonly used techniques to increase hydrophilicity PET films. Systematic improvement by adaption process can be aided comprehensive understanding morphology chemistry. imaging large areas (tens microns) resolution that allows quality challenging. As...
As part of the project upgrading FLASH, soft X-ray free electron laser (FEL) at DESY in Hamburg, into a seeded FEL, intense undulator-based THz source will be geometrically separated from XUV FEL. This allows beamline to operate fully parallel and largely independent while transmission enhanced for frequencies higher than 6THz. In newly designed semi-permanent endstation, beam (approx. 4-60nm), (1-30THz) pump-probe (200nm 1.25$\mu$m) can combined study solid state- surface physics...
The FLASH2020 + upgrade project will include a new semi-permanent endstation for the FLASH1 THz beamline at DESY [1]. FLASH THz-XUV pump probe facility provides XUV and pulses with low timing jitter. Combining these photon beams pump-probe experiments alongside an externally synchronized near-infrared (NIR) femtosecond laser system promote research in various scientific fields. is capable of offering both, transmission- reflection geometries combined additional features such as cryo-magnet...