J. Collier
A5105513335- Scientific Measurement and Uncertainty Evaluation
- Surface Treatment and Residual Stress
- Diamond and Carbon-based Materials Research
- High-pressure geophysics and materials
- Laser Material Processing Techniques
- Ion-surface interactions and analysis
Rutherford Appleton Laboratory
2024-2025
X-ray free electron laser (XFEL) sources coupled to high-power systems offer an avenue study the structural dynamics of materials at extreme pressures and temperatures. The recent commissioning DiPOLE 100-X on high energy density (HED) instrument European XFEL represents state-of-the-art in combining x-ray diffraction with compression, allowing for compressed be probed unprecedented detail. Here, we report quantitative measurements molten Sn 85(5) GPa ∼3500 K. capabilities HED enable liquid...
We present 50-fs, single-shot measurements of the x-ray thermal diffuse scattering (TDS) from copper foils that have been shocked via nanosecond laser-ablation up to pressures above 135~GPa. hence deduce Debye-Waller (DW) factor, providing a temperature measurement. The targets were laser-shocked with DiPOLE 100-X laser at High Energy Density (HED) endstation European X-ray Free-Electron Laser (EuXFEL). Single pulses, photon energy 18 keV, scattered samples and recorded on Varex detectors....
We present 50-fs, single-shot measurements of the x-ray thermal diffuse scattering (TDS) from copper foils that have been shocked via nanosecond laser ablation up to pressures above ∼135 GPa. hence deduce Debye–Waller factor, providing a temperature measurement. The targets were laser-shocked with DiPOLE 100-X at High Energy Density endstation European X-ray Free-Electron Laser. Single pulses, photon energy 18 keV, scattered samples and recorded on Varex detectors. Despite being highly...