Author: Hermange, H.
Paper Title Page
Two Shielded End-Stations at MARS Beamline of SOLEIL Synchrotron: Specific Devices for the Highly Irradiating Materials Analysis  
  • P. Mandin, R. Boullon, R. Lauberton, D. Leterme, Y. Robert, N. jonquères
    CEA, DES-ISAS-DM2S, Université Paris-Saclay, Gif-sur-Yvette, France
  • J-L. Béchade, R. Guillou
    CEA, DES-ISAS-DMN, Paris-Saclay University, Gif-sur-Yvette, France
  • H. Hermange, M.O.J.Y. Hunault, D. Menut, J.B.P. Pruvost, P.L. Solari
    SOLEIL, Gif-sur-Yvette, France
  • S. Schlutig, P. Valenza
    CEA, DES-IRESNE-DEC, Université Paris-Saclay, Saint-Paul-Lez-Durance, France
  Funding: CEA / SOLEIL
Since the mid-2000s, the engineers and researchers of CEA and SOLEIL synchrotron facility have worked together to design a world unique beamline for the study of radioactive matter: MARS (Multi Analyses on Radioactive Samples Beamline)*. The facility works in the hard X-ray domain (between 3.0 and 35 keV) combining both X-ray spectroscopy and X-ray diffraction/scattering techniques on two end-stations: CX2 and CX3. MARS beamline is authorized by the ASN (French Nuclear Safety Authority) to analyze samples with radioactivities up to 18.5 GBq per sample for alpha and beta emitters and up to 2 GBq for gamma and neutron emitters. One of its main objectives is to be able to analyze these highly irradiating samples, such as spent nuclear reactor fuel or irradiated nuclear material (solid, liquid), to study their structural and chemical evolutions after irradiation. This article describes the components designed and realized with the major contribution of CEA to analyze such kind of samples: #1 air-tight sample holders; #2 positioning mechanical systems on the X-ray beam; #3 local analyzer devices; #4 two shieldings to safeguard users; #5 a mobile-shielded cask to transport samples.
*Sitaud, B. et al., H. Characterization of radioactive materials using the MARS beamline at the synchrotron SOLEIL. Journal of Nuclear Materials 425, 238-243 (2012).
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Design of an Advance Detector Support to Allow High Quality GISAXS/GIWAXS Experiments on the MARS Beamline at SOLEIL  
  • D. Menut, Y.-M. Abiven, J.M. Dubuisson, C. Engblom, J.L. Giorgetta, H. Hermange, M. Sebdaoui, P.L. Solari
    SOLEIL, Gif-sur-Yvette, France
  The MARS beamline*, operating at SOLEIL since 2010, has been developed to provide researchers with advanced X-ray techniques to characterize nuclear materials. The diversity in users’ demands has driven the development of the most suitable detector support to accommodate novel experiments that have not been specified at the time of design. The choice complied with constraints related to the installation in a narrow experimental hutch along with easy transport and maintenance. The system consists of a long-range linear table (Ts) mounted on a wide angular (-1° ; +65°) Rx rotation; Rx can be moved off the beam axis (Tx) to align the detector with the transmitted/reflected beam. It accommodates for any detector by only changing the kinematic interface with Ts. It is worth remarking on the wide angular range with a potential concentration of mass at the end of the arm (payload : 55 kg). FEA was done to study its structural behavior. Performing movements with low SOC values not only puts constraints on the mechanics, but also on control system. As such, Delta Tau Powerbrick controller has been implemented. The design project is complete and built with commissioning work to be done.
*Sitaud, B., Solari, P. L., Schlutig, S., Llorens, I. & Hermange, H. Characterization of radioactive materials using the MARS beamline at the synchrotron SOLEIL. J. Nucl. Mater. 425, 238-243 (2012).
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