Irradiation and performance of RGB-HD Silicon Photomultipliers for calorimetric applications

open44siThis project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement no. 654168 and no. 681647. The authors gratefully acknowledge CERN and the PS staff for successfully operating the East Experimental Area and for continuous supports to the users. We thank L. Gatignon, M. Jeckel and H. Wilkens for help and suggestions during the data taking on the PS-T9 beamline. We are grateful to the INFN workshops of Bologna, Milano Bicocca and Padova for the construction of detector and to A. Bau and G. Pessina for support during the installation of the SiPM.Silicon Photomultipliers with cell-pitch ranging from 12 μm to 20 μm were tested against neutron irradiation at moderate fluences to study their performance for calorimetric applications. The photosensors were developed by FBK employing the RGB-HD technology. We performed irradiation tests up to 2 × 1011 n/cm2 (1 MeV eq.) at the INFN-LNL Irradiation Test facility. The SiPMs were characterized on-site (dark current and photoelectron response) during and after irradiations at different fluences. The irradiated SiPMs were installed in the ENUBET compact calorimetric modules and characterized with muons and electrons at the CERN East Area facility. The tests demonstrate that both the electromagnetic response and the sensitivity to minimum ionizing particles are retained after irradiation. Gain compensation can be achieved increasing the bias voltage well within the operation range of the SiPMs. The sensitivity to single photoelectrons is lost at ∼ 1010 n/cm2 due to the increase of the dark current.openAcerbi F.; Ballerini G.; Berra A.; Brizzolari C.; Brunetti G.; Catanesi M.G.; Cecchini S.; Cindolo F.; Coffani A.; Collazuol G.; Conti E.; Corso F.D.; Delogu C.; Rosa G.D.; Gola A.; Intonti R.A.; Jollet C.; Kudenko Y.; Longhin A.; Ludovici L.; Magaletti L.; Mandrioli G.; Margotti A.; Mascagna V.; Mauri N.; Meregaglia A.; Pari M.; Pasqualini L.; Paternoster G.; Patrizii L.; Piemonte C.; Pozzato M.; Pupilli F.; Prest M.; Radicioni E.; Riccio C.; Ruggeri A.C.; Scian C.; Sirri G.; Soldani M.; Tenti M.; Torti M.; Terranova F.; Vallazza E.Acerbi F.; Ballerini G.; Berra A.; Brizzolari C.; Brunetti G.; Catanesi M.G.; Cecchini S.; Cindolo F.; Coffani A.; Collazuol G.; Conti E.; Corso F.D.; Delogu C.; Rosa G.D.; Gola A.; Intonti R.A.; Jollet C.; Kudenko Y.; Longhin A.; Ludovici L.; Magaletti L.; Mandrioli G.; Margotti A.; Mascagna V.; Mauri N.; Meregaglia A.; Pari M.; Pasqualini L.; Paternoster G.; Patrizii L.; Piemonte C.; Pozzato M.; Pupilli F.; Prest M.; Radicioni E.; Riccio C.; Ruggeri A.C.; Scian C.; Sirri G.; Soldani M.; Tenti M.; Torti M.; Terranova F.; Vallazza E