Abstract:
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[EN] The KM3NeT Collaboration is currently constructing a multi-site high-energy neutrino telescope in the Mediterranean Sea consisting of matrices of pressure-resistant glass spheres, each holding a set of 31 small-area ...[+]
[EN] The KM3NeT Collaboration is currently constructing a multi-site high-energy neutrino telescope in the Mediterranean Sea consisting of matrices of pressure-resistant glass spheres, each holding a set of 31 small-area photomultipliers. The main goals of the telescope are the observation of neutrino sources in the Universe and the measurement of the neutrino oscillation parameters with atmospheric neutrinos. A relative time synchronisation between photomultipliers of the nanosecond arder needed to guarantee the required angular resolution of the detector. Due to the large detector volumes to be instrumented by KM3NeT, a cost reduction of the different systems is a priority. To this end, the inexpensive Nanobeacon has been designed and developed by the KM3NeT Collaboration to be used for detector time-calibration studies. At present, more than 600 Nanobeacons have been already produced. The characterisation of the optical pulse and the wavelength emission profile of the devices is critica! for the time calibration. The optical pulse rise time has been quantified as less than 3 ns, while the Full Width Half Maximum is less than 6 ns. The wavelength drift, due to a variation of the supply voltage, has also been qualified as lower than 10 nm for the full range of the Nanobeacon. In this paper, more details about the main features of the Nanobeacon design, production and operation, together with the main properties of the light pulse generated are described.
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Project ID:
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-096663-A-C42/ES/CARACTERIZACION DEL FONDO ACUSTICO EN EL OBSERVATORIO SUBMARINO KM3NET/
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-096663-A-C42/ES/CARACTERIZACION DEL FONDO ACUSTICO EN EL OBSERVATORIO SUBMARINO KM3NET/
info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//CIDEGENT%2F2019%2F043//AYUDA CONTRATACION CIDEGENT INVESTIGADORES DE EXCELENCIA-ARDID RAMIREZ, JOAN/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-096663-B-C41/ES/FISICA FUNDAMENTAL Y ASTRONOMIA MULTIMENSAJERO CON TELESCOPIOS DE NEUTRINOS/
info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//GRISOLIAP%2F2018%2F119//AYUDA SANTIAGO GRISOLIA PROYECTO: ACUSTICA EN DETECTORES DE PARTICULAS/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-096663-B-C43/ES/FISICA FUNDAMENTAL, DETECCION ACUSTICA Y ASTRONOMIA MULTI-MENSAJERO CON TELESCOPIOS DE NEUTRINOS EN LA UPV/
info:eu-repo/grantAgreement/Junta de Andalucía//A-FQM-053-UGR18 /
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-096663-B-C44/ES/FISICA FUNDAMENTAL Y ASTRONOMIA MULTI-MENSAJERO CON TELESCOPIOS DE NEUTRINOS EN LA UGR/
info:eu-repo/grantAgreement/ANR//ANR-15-CE31-0020 /
info:eu-repo/grantAgreement/EC/H2020/101025085/EU
info:eu-repo/grantAgreement/ANR//ANR-18-IDEX-0001 /
info:eu-repo/grantAgreement/GVA//PROMETEO%2F2020%2F019/
info:eu-repo/grantAgreement/GVA//CIDEGENT%2F2020%2F049 /
info:eu-repo/grantAgreement/GVA//CIDEGENT%2F2018%2F034 /
info:eu-repo/grantAgreement/MIUR//NAT-NET 2017W4HA7S /
info:eu-repo/grantAgreement/NCN//2015%2F18%2FE%2FST2%2F00758 /
info:eu-repo/grantAgreement/ICTP//AF-13/
info:eu-repo/grantAgreement/Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona//LCF%2FBQ%2FIN17%2F11620019 /
info:eu-repo/grantAgreement/SRNSF//FR-18-1268/
info:eu-repo/grantAgreement/LabEx UnivEarthS//ANR-10-LABX-0023 /
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Thanks:
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The authors acknowledge the financial support of the funding agencies: Agence Nationale de la Recherche (contract ANR-15-CE31-0020), Centre National de la Recherche Scientifique (CNRS), Commission Europeenne (FEDER fund ...[+]
The authors acknowledge the financial support of the funding agencies: Agence Nationale de la Recherche (contract ANR-15-CE31-0020), Centre National de la Recherche Scientifique (CNRS), Commission Europeenne (FEDER fund and Marie Curie Program), Institut Universitaire de France (IUF), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), Paris Ile-de-France Region, France; Shota Rustaveli National Science Foundation of Georgia (SRNSFG, FR-18-1268), Georgia; Deutsche Forschungsgemeinschaft (DFG), Germany; The General Secretariat of Research and Technology (GSRT), Greece; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell'Universita e della Ricerca (MIUR), PRIN 2017 program (Grant NAT-NET 2017W4HA7S) Italy; Ministry of Higher Education Scientific Research and Professional Training, ICTP through Grant AF-13, Morocco; Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; The National Science Centre, Poland (2015/18/E/ST2/00758); National Authority for Scientific Research (ANCS), Romania; Ministerio de Ciencia, Innovacion, Investigacion.. Universidades (MCIU): Programa Estatal de Generacion de Conocimiento (refs. PGC2018-096663-B-C41, -A-C42, -B-C43, -B-C44) (MCIU/FEDER), Generalitat Valenciana: Prometeo (PROMETEO/2020/019), Grisolia (ref. GRISOLIA/2018/119) and GenT (refs. CIDEGENT/2018/034,/2019/043,/2020/049) programs, Junta de Andalucia (ref. A-FQM-053-UGR18), La Caixa Foundation (ref. LCF/BQ/IN17/11620019), EU: MSC program (ref. 101025085), Spain.
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