Oxford Centre for High Energy Density Science (OxCHEDS)

Abstract:

We introduce a setup to measure high-resolution inelastic x-ray scattering at the High Energy Density scientific instrument at the European X-Ray Free-Electron Laser (XFEL). The setup uses the Si (533) reflection in a channel-cut monochromator and three spherical diced analyzer crystals in near-backscattering geometry to reach a high spectral resolution. An energy resolution of 44 meV is demonstrated for the experimental setup, close to the theoretically achievable minimum resolution. The analyzer crystals and detector are mounted on a curved-rail system, allowing quick and reliable changes in scattering angle without breaking vacuum. The entire setup is designed for operation at 10 Hz, the same repetition rate as the high-power lasers available at the instrument and the fundamental repetition rate of the European XFEL. Among other measurements, it is envisioned that this setup will allow studies of the dynamics of highly transient laser generated states of matter.

Abstract:

The epigraphical cursus honorum of Sex. Attius Suburanus Aemilianus mentions the task of procurator Augusti Alpium Cottianarum et Pedatium Tyriorum et Cammuntiorum et Lepontiorum, otherwise not attested, which he held at the beginning of Domitian's reign. In addition to the province of the Cottian Alps, Suburanus Aemilianus had competence on three other little-known Alpine communities. The authors propose the identification of these communities and reflect on the tasks of this procurator. Their analysis unveils chronological and juridical novelties as well as new hints about imperial administration in the Alps under Domitian.

Abstract:

Raw data from NIF experiment ad figures.

Abstract:

The research paper associated with this dataset experimentally demonstrates the time-resolved operation of a turbulent laser-plasma dynamo (https://www.pnas.org/doi/10.1073/pnas.2015729118). The dataset contains the data reported in the paper’s figures, obtained during experiments at the Omega Laser Facility (Laboratory for Laser Energetics, Rochester, New York, USA) in May 2017. It comprises three types of data: X-ray self-emission imaging data to characterise the plasma turbulence; Thomson-scattering data to diagnose temperatures, densities, and velocities; and proton-imaging data to diagnose magnetic fields. All files are stored as MATLAB figures. Further details of the data and analysis methods can be found in the original publication.