ROBL-II at ESRF: a synchrotron toolbox for actinide research

ROBL-II provides four different experimental stations to investigate actinide and other alpha- and beta-emitting radionuclides at the new EBS storage ring of ESRF within an energy range of 3 to 35 keV. The XAFS station consists of a highly automatized, high sample throughput installation in a glovebox, to measure EXAFS and conventional XANES of samples routinely at temperatures down to 10 K, and with a detection limit in the sub-p.p.m. range. The XES station with its five bent-crystal analyzer, Johann-type setup with Rowland circles of 1.0 and 0.5 m radii provides high-energy resolution fluorescence detection (HERFD) for XANES, XES, and RIXS measurements, covering both actinide L and M edges together with other elements accessible in the 3 to 20 keV energy range. The six-circle heavy duty goniometer of XRD-1 is equipped for both high-resolution powder diffraction as well as surface-sensitive CTR and RAXR techniques. Single crystal diffraction, powder diffraction with high temporal resolution, as well as X-ray tomography experiments can be performed at a Pilatus 2M detector stage (XRD-2). Elaborate radioprotection features enable a safe and easy exchange of samples between the four different stations to allow the combination of several methods for an unprecedented level of information on radioactive samples for both fundamental and applied actinide and environmental research.

Automated summary

ROBL-II at the new EBS storage ring of ESRF provides four experimental stations for the investigation of actinide and other alpha- and beta-emitting radionuclides in an energy range of 3 to 35 keV. These stations include XAFS and XES for X-ray absorption and emission spectroscopy, XRD-1 for high-resolution powder diffraction and surface-sensitive techniques, and XRD-2 for single crystal and powder diffraction experiments. Elaborate radioprotection features enable safe exchange of samples between the stations for a combination of methods in actinide and environmental research.