Speaker
Summary
Porous carbides are regarded as the most employed target materials for the production of radioactive ion beams for research in the context of ISOL (Isotope Separation On-Line) facilities. According to the ISOL technique, nuclear reactions are induced by the interaction of an energetic primary particle beam with a target, producing a characteristic set of radionuclides that are subsequently released thanks to the high target working temperature (1600÷2000°C), ionized and extracted into a beam. Among the possible target materials, titanium carbide is regarded as one of the most suitable materials for the ISOL production of scandium isotopes of medical interest, such as 43Sc, 44Sc and 47Sc [1,2]. However, dedicated studies highlighted issues in the release of Sc isotopes from titanium carbide, effectively limiting the achievable Sc ion beam intensities. In the framework of the INFN HISOL_NEXT experiment, a new generation of higher efficiency ISOL targets is under development for the SPES ISOL facility at INFN-LNL. In particular, regular titanium carbide porous structures are being realized with the Digital Light Processing additive manufacturing technology, paving the way for a new generation of targets capable of providing higher isotope yields. Such aim is achieved by both increasing the target heat dissipation properties, and consequently the acceptable maximum primary beam intensity, and improving the release capabilities thank to the tailored macro- and microstructure. Along with the development of the target production technology, the design of a target with these characteristics required also the definition of a new complex simulation approach, capable of handling complex geometries with many free parameters. Such approach includes the 3D modelling of the target periodic structures, the Monte Carlo simulation of the target interaction with the primary beam, and the Multiphysics simulation of the target working conditions. The complex simulation procedure and the most promising results will be presented in detail.
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