Speaker
Description
The HiRadMat beamline at SPS, CERN, made possible materials science experiments at high energy densities driven by high intensity proton beam pulses with short duration. Although for light materials at some of the future facilities, the deposited power density in the beam intercepting devices is much higher than what can be achieved at HiRadMat, this facility offers an unprecedented test bench of innovative materials solutions for components for the future high–power accelerator facilities like FAIR, Hi-Lumi LHC, FRIB, neutrino factories, ESS, ITER and for ESA missions. In the past years comparison of the response of different materials and design to beam induced transient thermal stresses, validation of calculated figure of merits and FEM simulations and failure thresholds were performed within numerous experiments. Some of the important unsolved issues for the application of these materials at future accelerator facilities are: how the accumulated radiation dose will impact on the lifetime of the components, which are the failure scenarios of irradiated materials in comparison to pristine materials and how to mitigate premature failure of components due to radiation-induced thermo-mechanical properties degradation. An intense campaign at GSI tries to tackle this complex puzzle by quantitative measurements of thermo-mechanical properties of irradiated materials, deriving scaling laws for extrapolation to operational conditions and using a broad spectrum of impact techniques on irradiated materials to understand the dynamic response as a function of accumulated dose. This work will present planned beam impact experiments at HiRadMat on irradiated and functionally graded materials. Such experiments are extrapolating the current knowledge acquired at GSI from microscale impact techniques using nanoindentation and short pulse, intense swift heavy ions impact experiments using online monitoring techniques. Possible pump-probe experiments using laser-based diagnostic, enabling online structural degradation studies during ion-beam driven shock experiments will be discussed.