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13 December 2020 The XGIS instrument on-board THESEUS: the detection plane and on-board electronics
F. Fuschino, R. Campana, C. Labanti, L. Amati, E. Virgilli, L. Terenzi, P. Bellutti, G. Bertuccio, G. Borghi, F. Ficorella, M. Gandola, M. Grassi, G. La Rosa, P. Lorenzi, P. Malcovati, F. Mele, P. Orleański, A. Picciotto, A. Rachevski, I. Rashevskaya, A. Santangelo, P. Sarra, G. Sottile, C. Tenzer, A. Vacchi, G. Zampa, N. Zampa, Nicola Zorzi, Paul Hedderman, M. Winkler, Alessandro Gemelli, Ifran Kuvvetli, Søren Møller Pedersen, Denis Tcherniak, Lucas Christoffer Bune Jensen
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Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114448R (2020) https://doi.org/10.1117/12.2561002
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
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 4.5×4.5×30 mm3 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).
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F. Fuschino, R. Campana, C. Labanti, L. Amati, E. Virgilli, L. Terenzi, P. Bellutti, G. Bertuccio, G. Borghi, F. Ficorella, M. Gandola, M. Grassi, G. La Rosa, P. Lorenzi, P. Malcovati, F. Mele, P. Orleański, A. Picciotto, A. Rachevski, I. Rashevskaya, A. Santangelo, P. Sarra, G. Sottile, C. Tenzer, A. Vacchi, G. Zampa, N. Zampa, Nicola Zorzi, Paul Hedderman, M. Winkler, Alessandro Gemelli, Ifran Kuvvetli, Søren Møller Pedersen, Denis Tcherniak, and Lucas Christoffer Bune Jensen "The XGIS instrument on-board THESEUS: the detection plane and on-board electronics", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114448R (13 December 2020); https://doi.org/10.1117/12.2561002
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KEYWORDS
Electronics
Integrated circuit design
Sensors
Gamma ray imaging
Optical components
Photodetectors
Scintillation
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