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
TL;DR
This paper reports on the development of LGAD sensors with a thin entrance window that significantly enhances soft X-ray detection, enabling single photon resolution at energies as low as 452 eV.
Contribution
It introduces an optimized LGAD sensor with a thin entrance window that improves quantum efficiency and enables single photon detection in the soft X-ray range.
Findings
Single photon detection of soft X-rays down to 452 eV achieved
Signal-to-noise ratio better than 20 demonstrated
Optimized entrance window enhances quantum efficiency
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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Taxonomy
TopicsAdvanced X-ray and CT Imaging · Medical Imaging Techniques and Applications · Particle Detector Development and Performance