PSI - Issue 78

Michele Angiolilli et al. / Procedia Structural Integrity 78 (2026) 1807–1814

1814

Fig. 4. a) False floor FEM components; b) Von Mises stress on the SS finishing layer; c) False floors inserted inside the cryostat; d) pounding e ff ect on the lateral seismic device; e) FEA results of the clean room metallic framework in terms of flexural stress distribution at the seismic load case.

in Fig. 4e, highlighting the substantial utilization of the upper cryostat flanges that, however, remained within the utilization limits specified in the executive design, thanks to the conceived structural system.

6. Conclusions

This paper has presented the concept and design of the DarkSide-20k experiment for direct dark matter detection, mainly focusing on the engineering aspects. The project entered its construction phase in 2023 with the installation of the cryostat in LNGS. Extensive work has since continued, with numerous engineering activities still underway to advance the integration of components and ensure compliance with stringent design and performance requirements. Completion of the installation and readiness for commissioning are expected by the end of 2027.

References

B. Abi, R. Acciarri, M. Acero, G. Adamov, A. Giorge et al., 2020. Volume I. Introduction to DUNE. Journal of Instrumentation, 15, T08008 E. Aaron et al., 2023. Measurement of isotopic separation of argon with the prototype of the cryogenic distillation plant Aria for dark matter searches. The European Physical Journal C., 83(5), 453 L. Consiglio, 2024. The nuova o ffi cina assergi: future perspectives beyond DarkSide-20k. In: XVIII Int.tional Conference on Topics in Astroparticle and Underground Physics. p. 310. A. Zani, 2024. The DarkSide-20k experiment. Journal of Instrumentation, 19.03: C03058. F. Acerbi, P. Adhikari, P. Agnes, I. Ahmad, S. Albergo, I. et al., 2024. A new hybrid gadolinium nanoparticles-loaded polymeric material for neutron detection in rare event searches. Journal of Instrumentation, 19(09), P09021. NTC18, Ministerial Decree DM, Norme tecniche per le costruzioni in zone sismiche, in italian, Ministerial Decree DM; 2018. F. Acerbi, P. Adhikari, P. Agnes, I. Ahmad, S. Albergo, I. et al., 2025. Flow and thermal modelling of the argon volume in the DarkSide-20k TPC. Journal of Instrumentation, 20(06), P06046.