Speaker
Description
Beryllium is used as a reflector material at neutrons sources in order to enhance the production of low-energy neutrons available for neutron scattering studies. Such a reflector will be installed at the European Spallation Source. In order to design the combined target/moderator/reflector system, typically Monte-Carlo calculations are carried out. Standard thermal scattering libraries available for these types of calculations assume a perfect polycrystalline material [1,2]. However, the reality is that inhomogeneities in the real material could lead to deviations from the polycrystalline state. For this reason, we performed combined neutron diffraction and transmission measurements on four samples of beryllium at HIPPO at the Los Alamos National Laboratory. In this work we present an overview of the measurements carried out and analysis using tools developed with the NCrystal software [3,4]. The results of the measurements can be used to benchmark new thermal scattering libraries for Monte-Carlo calculations [5,6].
References
[1] E. Fermi, W.J. Sturm and R.G. Sachs, Phys. Rev. 71 (1947) 589.
[2] G. Muhrer et al., Nucl. Instrum. and Meth. Phys. Res. A 578 (2007) 463.
[3] X.-X. Cai and T. Kittelmann, Comp. Phys. Comm. 246 (2020) 106851.
[4] Kittelmann T, Cai X-X. Comput Phys Commun. 267 (2021) 108082.
[5] D.D. DiJulio et al., Journal of Neutron Research 22 (2020) 275.
[6] D.D. DiJulio et al., EPJ Web of Conferences 284 (2023) 17013.
| Abstract Topic | Application studies |
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