In Situ Characterization Possibilities at The Mosaic Platform - JANNuS-Orsay
Present and Future

Mosaic is the new name of the platform involving the ion accelerators and the tools of chemical and structural characterization of materials located at IJCLab [1]. This includes the JANNuS-Orsay experimental hall, which is in particular known from the community of nuclear materials for the diversity of ion beams that can be produced, as well as the possibilities of <i>in situ</i> characterization of the microstructural evolution of ion implanted or irradiated materials. <i>In situ</i> Transmission Electron Microscopy (TEM) with one or two ion beams can be performed in a large range of temperatures for studies at the nanometric scale. The damage induced in a single crystal can also be studied through <i>in situ</i> Rutherford Backscattered Spectrometry in Channelling geometry (RBS-C) experiments thanks to the coupling of two ion accelerators. The possibilities, and some limitations, of these two <i>in situ</i> characterization methods currently available at Mosaic will be developed through a few examples of experiments performed on materials of interest for nuclear applications. The Mosaic platform is also in the process of completing its range of <i>in situ</i> tools for the characterization of irradiated materials with the acquisition of an X-ray diffractometer that will be modified for <i>in situ</i> measurements, and that will be available at the beginning of 2026. Examples of future possible experiments will be given along with the characteristics of this X-ray diffractometer.<br/><br/>The MOSAIC technical staff, in particular C. Bachelet, C. Baumier, P. Benoit-Lamaitrie, J. Bourçois, L. Delbecq, S. Hervé, C. Oriol, F. Pallier, and S. Picard, are gratefully acknowledged for their unfailing assistance during <i>in situ</i> experiments.<br/><br/>[1] https://mosaic.ijclab.in2p3.fr