Development of LGAD sensors with a thin entrance window for soft X-ray detection

Jiaguo Zhang; Rebecca Barten; Filippo Baruffaldi; Anna Bergamaschi; Giacomo Borghi; Maurizio Boscardin; Martin Brueckner; Maria Carulla; Matteo Centis Vignali; Roberto Dinapoli; Simon Ebner; Francesco Ficorella; Erik Froejdh; Dominic Greiffenberg; Omar Hammad Ali; Julian Heymes; Shqipe Hasanaj; Viktoria Hinger; Thomas King; Pawel Kozlowski; Carlos Lopez-Cuenca; Davide Mezza; Konstantinos Moustakas; Aldo Mozzanica; Giovanni Paternoster; Sabina Ronchin; Christian Ruder; Bernd Schmitt; Dhanya Thattil

doi:10.1088/1748-0221/17/11/c11011

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arXiv · 2210.12993

Development of LGAD sensors with a thin entrance window for soft X-ray detection

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Abstract

We show the developments carried out to improve the silicon sensor technology for the detection of soft X-rays with hybrid X-ray detectors. An optimization of the entrance window technology is required to improve the quantum efficiency. The LGAD technology can be used to amplify the signal generated by the X-rays and to increase the signal-to-noise ratio, making single photon resolution in the soft X-ray energy range possible. In this paper, we report first results obtained from an LGAD sensor production with an optimized thin entrance window. Single photon detection of soft X-rays down to 452~eV has been demonstrated from measurements, with a signal-to-noise ratio better than 20.

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Jiaguo Zhang, Rebecca Barten, Filippo Baruffaldi, Anna Bergamaschi, Giacomo Borghi, Maurizio Boscardin, Martin Brueckner, Maria Carulla, Matteo Centis Vignali, Roberto Dinapoli, Simon Ebner, Francesco Ficorella, Erik Froejdh, Dominic Greiffenberg, Omar Hammad Ali, Julian Heymes, Shqipe Hasanaj, Viktoria Hinger, Thomas King, Pawel Kozlowski, Carlos Lopez-Cuenca, Davide Mezza, Konstantinos Moustakas, Aldo Mozzanica, Giovanni Paternoster, Sabina Ronchin, Christian Ruder, Bernd Schmitt, Dhanya Thattil. 2022-10-24. Development of LGAD sensors with a thin entrance window for soft X-ray detection. https://doi.org/10.1088/1748-0221/17/11/c11011

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