The Rossendorf Beamline is one of 12 Collaborating Research Group (CRG) beamlines, located at bending magnet 20 of the ESRF. It is owned and operated by the Helmholtz-Zentrum Dresden Rossendorf (HZDR, Germany), and is dedicated to actinide sciences and radioactive waste disposal research. The beamline consists of two experimental stations:
- RCH-I: equipped for X-ray absorption spectroscopy at ultradilute concentrations (XAS, XANES, EXAFS). This station is fully nuclearized.
- RCH-II: equipped with a Johann-type spectrometer and a heavy-duty 6-circle goniometer (HR-XANES, XES, RIXS, PXRD, CTR, RAXR). This station will be fully nuclearized in 2020.
- Fundamental and applied radioecological research to allow for better risk assessments of nuclear waste storage; improved remediation strategies for areas contaminated by radionuclides; chemical speciation of radionuclides in soils, sediments, aquifers, mining shafts etc.; investigation of binding mechanisms of radionuclides with natural and anthropogenic organic matter, micro-organisms, clay minerals, rock surfaces; influence of these interactions on radionuclide migration and retardation in the environment.
- Collimating mirror with Pt, Rh and Si surfaces (water-cooled)
- Double-crystal monochromator with three pairs of crystals (Si(111), Si(111)90°, Si(311) mounted on one axis (water-cooled)
- Double-multilayer monochromator
- Horizontally focussing mirror with two toroids with Pt and Rh coating and a flat Si surface
- Slits and beam diagnostics after each optical element
- Useful energy range 5-35 keV with all crystal pairs
- Standard equipment to perform XANES (X-ray absorption near edge spectroscopy) and EXAFS (extended X-ray absorption fine-structure spectroscopy)
- 13-element, high-throughput Ge-detector for fluorescence detection of dilute samples
- 4-element Si-DRIFT detector for higher energy resolution
- Closed-cycle He-Cryostat for sample cooling down to 15 K
- Safety features and legal permission to run a range of radionuclides with a maximum activity of 185 MBq
- Electrochemical cell for in-situ modification of redox
- Automated sample holders
- Johann-type spectrometer with 0.5 and 1 m radius, currently operating with one crystal; a full 5-crystal installation will be reday in 2017.
- 6-circle Huber diffractometer for PXRD, CTR and RAXR; an upgrade to single-Xtal XRD is planned for the future.
Please visit the website of the Rossendorf Beamline at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR).