The Neutrino Mediterranean Observatory Laser Beacon: Design and Qualification Real, Diego Sánchez Losa, Agustín Díaz García, Antonio Francisco Salesa Greus, Francisco Calvo, David Neutrino telescope Time calibration Laser beacon This research was funded by the Ministerio de Ciencia e Innovación: Programa Estatal para Impulsar la Investigación Científico-Técnica y su Transferencia (refs. PID2021-124591NB-B-C41) (MCIU/FEDER); the Programa de Planes Complementarios I+D+I (refs. ASFAE/2022/023); Generalitat Valenciana: Prometeo (PROMETEO/2020/019); the Grisolía (ref. GRISOLIAP/2021/192) and GenT (refs. CIDEGENT/2018/034, /2020/049, /2021/23) programs; and the EU: MSC program (ref. 101025085), Spain. This paper encapsulates details of the NEMO laser beacon's design, offering a profound contribution to the field of the time calibration of underwater neutrino telescopes. The mechanical design of the laser beacon, which operates at a depth of 3500 m, is presented, together with the design of the antibiofouling system employed to endure the operational pressure and optimize the operational range, enhancing its functionality and enabling time calibration among multiple towers. A noteworthy innovation central to this development lies in the battery system. This configuration enhances the device's portability, a crucial aspect in underwater operations. The comprehensive design of the laser beacon, encompassing the container housing, the requisite battery system for operation, electronics, and an effective antibiofouling system, is described in this paper. Additionally, this paper presents the findings of the laser beacon's qualification process. 2023-10-25T12:26:09Z 2023-10-25T12:26:09Z 2023-09-02 info:eu-repo/semantics/article Real, D.; Sánchez Losa, A.; Díaz, A.; Salesa Greus, F.; Calvo, D. The Neutrino Mediterranean Observatory Laser Beacon: Design and Qualification. Appl. Sci. 2023, 13, 9935. [https://doi.org/10.3390/app13179935] https://hdl.handle.net/10481/85251 10.3390/app13179935 eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional MDPI