FUSCHINO, FabioFabioFUSCHINOCAMPANA, RICCARDORICCARDOCAMPANALABANTI, CLAUDIOCLAUDIOLABANTIAMATI, LorenzoLorenzoAMATIVirgilli, E.E.VirgilliTERENZI, LucaLucaTERENZIBellutti, P.P.BelluttiBertuccio, G.G.BertuccioBorghi, G.G.BorghiFicorella, F.F.FicorellaGandola, M.M.GandolaGrassi, M.M.GrassiLA ROSA, GIOVANNIGIOVANNILA ROSALorenzi, P.P.LorenziMalcovati, P.P.MalcovatiMele, F.F.MeleOrleański, P.P.OrleańskiPicciotto, A.A.PicciottoRachevski, A.A.RachevskiRashevskaya, I.I.RashevskayaSantangelo, A.A.SantangeloSarra, P.P.SarraSOTTILE, GiuseppeGiuseppeSOTTILETenzer, C.C.TenzerVacchi, A.A.VacchiZampa, G.G.ZampaZampa, N.N.ZampaZorzi, NicolaNicolaZorziHedderman, PaulPaulHeddermanWinkler, M.M.WinklerGemelli, AlessandroAlessandroGemelliKuvvetli, IfranIfranKuvvetliPedersen, Søren MøllerSøren MøllerPedersenTcherniak, DenisDenisTcherniakBune Jensen, Lucas ChristofferLucas ChristofferBune Jensen2025-03-202025-03-20202097815106367500277-786Xhttp://hdl.handle.net/20.500.12386/36888The X and Gamma Imaging Spectrometer instrument on-board the THESEUS mission (selected by ESA in the framework of the Cosmic Vision M5 launch opportunity, currently in phase A) is based on a detection plane composed of several thousands of single active elements. Each element comprises a 4.5×4.5×30 mm<SUP>3</SUP> CsI(Tl) scintillator bar, optically coupled at both ends to Silicon Drift Detectors (SDDs). The SDDs acts both as photodetectors for the scintillation light and as direct X-ray sensors. In this paper the design of the XGIS detection plane is reviewed, outlining the strategic choices in terms of modularity and redundancy of the system. Results on detector-electronics prototypes are also described. Moreover, the design and development of the lownoise front-end electronics is presented, emphasizing the innovative architectural design based on custom-designed Application-Specific Integrated Circuits (ASICs).STAMPAenConference paper10.1117/12.25610022-s2.0-85099313540https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11444/2561002/The-XGIS-instrument-on-board-THESEUS--the-detection-plane/10.1117/12.2561002.fullhttps://api.elsevier.com/content/abstract/scopus_id/850993135402020SPIE11444E..8RFFIS/05 - ASTRONOMIA E ASTROFISICA