Double differential light charged particle emission cross sections for some structural fusion materials

Ismail Hakki Sarpün,Abdullah Aydı N,Eyyup Tel,A Plompen,P Siegler,P Schillebeeckx,W Mondelaers,S Kopecky,J Heyse,F.-J Hambsch,S Oberstedt

doi:10.1051/epjconf/201714609026

Abstract

In fusion reactors, neutron induced radioactivity strongly depends on the irradiated material. So, a proper selection of structural materials will have been limited the radioactive inventory in a fusion reactor. First-wall and blanket components have high radioactivity concentration due to being the most flux-exposed structures. The main objective of fusion structural material research is the development and selection of materials for reactor components with good thermo-mechanical and physical properties, coupled with low-activation characteristics. Double differential light charged particle emission cross section, which is a fundamental data to determine nuclear heating and material damages in structural fusion material research, for some elements target nuclei have been calculated by the TALYS 1.8 nuclear reaction code at 14–15 MeV neutron incident energy and compared with available experimental data in EXFOR library. Direct, compound and pre-equilibrium reaction contribution have been theoretically calculated and dominant contribution have been determined for each emission of proton, deuteron and alpha particle.

Highlights

Fusion reactors need proper structural materials to become an efficient source of energy, especially if the promise of a green machine is to be maintained
Those neutrons lose their energy by interacting with reactor devices such as the blanket through various nuclear reactions and the heat produced by these nuclear reactions is called “nuclear heating” and is estimated by a simulation calculation in a reactor design
Calculated DDX for the emission of alpha particles from 46Ti(n,α) and 48Ti(n,α) reactions at 15.0 MeV (Figs. 1, 2) shows that the alpha particles up to the most probable energies are emitted predominantly through the compound nucleus formation whereas the higher energy alpha particles are emitted through the preequilibrium or the direct reaction

Summary

Introduction

Fusion reactors need proper structural materials to become an efficient source of energy, especially if the promise of a green machine is to be maintained. Reactor components, such as first wall, divertor and blanket, are subjected to the high-energy neutron impact, and to strong mechanical, heat and electromagnetic loadings. One of the essential data for simulation calculation is the energy and angular distributions of charged particles emitted by a nuclear reaction. These distributions are called “double differential cross section (DDX) data”. The DDX of light charged particle emission have been investigated by several researches both experimentally [8,9,10,11,12,13,14,15,16] and theoretically [17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32]

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Results

Conclusion