The XGIS instrument on-board THESEUS: the detection plane and on-board electronics
Fabio Fuschino, Riccardo Campana, Claudio Labanti, Lorenzo Amati,, Enrico Virgilli, Luca Terenzi, Pierluigi Bellutti, Giuseppe Bertuccio,, Giacomo Borghi, Francesco Ficorella, Massimo Gandola, Marco Grassi, Giovanni, La Rosa, Paolo Lorenzi, Piero Malcovati, Filippo Mele

TL;DR
The paper details the design and development of the XGIS instrument on the THESEUS mission, focusing on its detection plane, modular architecture, and innovative low-noise electronics using custom ASICs.
Contribution
It introduces the design of the XGIS detection plane, including modularity, redundancy, and the development of low-noise front-end electronics with custom ASICs.
Findings
Prototype detector-electronics results demonstrate system feasibility.
Innovative ASIC-based front-end electronics achieve low noise performance.
Design choices enhance modularity and redundancy for mission reliability.
Abstract
The 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 4.5x4.5x30 mm 3 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 low-noise front-end electronics is presented, emphasizing the innovative architectural design based on custom-designed Application-Specific Integrated…
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Taxonomy
TopicsParticle Detector Development and Performance · Radiation Detection and Scintillator Technologies · Gamma-ray bursts and supernovae
