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The Rossendorf Beamline at ESRF
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The Rossendorf Beamline has been built 1996-1998 by the former Forschungszentrum Dresden-Rossendorf which became (HZDR) at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. The beamline is operated since then by the HZDR as a so-called CRG beamline (Collaborative Research Group). Two-third of beamtime is used for in-house research, while one third is provided for experiments selected by the scientific advisory committee of the ESRF. The beamline has two experimental stations, one for Radiochemistry and one for Materials Research.
The Radiochemistry station is equipped to perform X-ray Absorption Spectroscopy (XAS) of dilute systems. Multiply redundant safety systems make it possible to measure predominantly alpha-emitting radionuclides. The Radiochemistry station is run by the Molecular Structures Division of the HZDR Institute of Radiochemistry and contributes predominantly to the Research Program Nuclear Safety Research and its subdivisions Actinides in biological systems and Actinides in permanent disposal sites. Research focuses on the identification, structural characterization and quantification of actinide (U, Np, Pu, Am, Cm) and other relevant radionuclide species (Tc, Se, Sb, Ni, Zn). This basic research contributes to improved risk assessments of, e.g., the former uranium mining and processing sites in Eastern Germany, or of nuclear waste repositories.
The Materials Research station is equipped with a a versatile, high-precision, heavy-duty 6-circle diffractometer for the structural characterization of surfaces, interfaces, and multilayers produced and modified by plasma and ion beam techniques. Most remarkable are the studies of growing thin films and nanocrystals during in-situ magnetron sputtering, and the investigation of simultaneous phase and conductivity transformations of ITO films during annealing. The station is supported by the HZDR Institute of Ion Beam Physics and Materials Research, and contributes mostly to the Research Programs Thin Films and Nanostructures.
Both experimental stations provide about 600 (8-hour) shifts of beamtime per year, which are used by some 25 teams of scientists. Every year about 15 experiments are performed in Materials Research, and about 30 in Radiochemistry, published in some 30-40 peer-reviewed publications.
Due to the highly specialized equipment, the beamline attracts users from all over Europe and even from Japan. Among them researchers from places like Max-Planck Institutes, the ETH Zurich, and collaborating industry partners. Access to the Radiochemistry Station of the Rossendorf Beamline is partly supported by the European Network of Excellence ACTINET (since 2004).