![]() ![]() It allows to focus on the set of best choices and to choose wisely the best configurations. The variation of beamdump parameters makes it possible to identify the set of optimal solutions, the Pareto front. To take into account the various constraints, noise on the detection system and radiation protection issues, several beamdump configurations are evaluated. In this work the Kriging metamodel based approach is used to optimize a neutron beamdump. This latter has been coupled to PROMETHEE, a software allowing multi-objective optimization for many simulation software. In this work, optimization has been performed using the Monte Carlo code TOUCANS, a neutron transport code based on Geant4 developed at CEA-Saclay. To optimize the performances of such a neutron source, it is necessary to maximize the thermal neutron flux while minimizing the contribution of other particles. At CEA-Saclay, a compact accelerator driven neutron source, SONATE, is investigated in taking advantage of the IPHI accelerator able to deliver a 3 MeV proton beam with an intensity up to 100 mA. ![]() These developments are reported in this article.įacilities providing bright thermal neutron beams are of primary importance for various research topics. They demonstrate the feasibility of such concept and enable to find the best TMR configuration for the future SONATE facility. ![]() At CEA-Saclay, several experiments were performed between 20 with the IPHI accelerator. In addition to the difficulties to operate such high intensity accelerators, the other challenges regard the target-moderator-reflector (TMR) design which is crucial to maximize the neutron flux at the detector location. In the future, SONATE is foreseen to operate with 20 MeV protons to increase the neutron brightness. Therefore, another local facility, affordable by one country, able to provide high brilliance neutron beams has to be built. This is the case in CEA-Saclay (France), where the Orphee reactor is planned to shutdown in 2019. However, these later facilities are ageing and the political context does not favor the building of new ones. Currently these are mainly spallation sources and nuclear reactors. Facilities providing bright thermal neutron beams are of primary importance for various research topics such as condensed matter experiments, neutron-imaging or medical applications. ![]()
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