Improving the eXTP/LAD detector energy resolution with a novel sensor design

Francesco Ceraudo; Giovanni Della Casa; Giuseppe Bertuccio; Walter Bonvicini; Riccardo Campana; Daniela Cirrincione; Ettore Del Monte; Yuri Evangelista; Marco Feroci; Francesco Ficorella; Mauro Fiorini; Marco Grassi; Piero Malcovati; Filippo Mele; Giancarlo Pepponi; Alexandre Rashevski; Irina Rashevskaya; Gianluigi Zampa; Nicola Zampa; Nicola Zorzi

doi:10.1117/12.3020007

21 August 2024 Improving the eXTP/LAD detector energy resolution with a novel sensor design

Francesco Ceraudo, Giovanni Della Casa, Giuseppe Bertuccio, Walter Bonvicini, Riccardo Campana, Daniela Cirrincione, Ettore Del Monte, Yuri Evangelista, Marco Feroci, Francesco Ficorella, Mauro Fiorini, Marco Grassi, Piero Malcovati, Filippo Mele, Giancarlo Pepponi, Alexandre Rashevski, Irina Rashevskaya, Gianluigi Zampa, Nicola Zampa, Nicola Zorzi

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130936R (2024) https://doi.org/10.1117/12.3020007
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The Large Area Detector is built around an array of linear Silicon Drift Detectors read out by dedicated CMOS Application-Specific Integrated Circuits. Strict constraints on power consumption and energy resolution (200 eV FWHM at 6 keV for single-channel events, ≤ 240 eV FWHM overall), impose a tough trade-off. We developed a new sensor architecture to improve the performance following two strategies: firstly by confining the signal charge diffusion during drift to a single channel, and secondly by focusing this charge to a smaller anode reducing the preamplifier’s noise contribution. Preliminary results show single-anode events increasing from 40% to > 94% for a best energy resolution of 219 eV FWHM at5.9 keV at 0 °C.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Francesco Ceraudo, Giovanni Della Casa, Giuseppe Bertuccio, Walter Bonvicini, Riccardo Campana, Daniela Cirrincione, Ettore Del Monte, Yuri Evangelista, Marco Feroci, Francesco Ficorella, Mauro Fiorini, Marco Grassi, Piero Malcovati, Filippo Mele, Giancarlo Pepponi, Alexandre Rashevski, Irina Rashevskaya, Gianluigi Zampa, Nicola Zampa, and Nicola Zorzi "Improving the eXTP/LAD detector energy resolution with a novel sensor design", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130936R (21 August 2024); https://doi.org/10.1117/12.3020007

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