Development of LGAD sensors with a thin entrance window for soft X-ray detection. (1st November 2022)

• Record Type: Journal Article
• Authors: Zhang, J.; Barten, R.; Baruffaldi, F.; Bergamaschi, A.; Borghi, G.; Boscardin, M.; Brückner, M.; Carulla, M.; Centis Vignali, M.; Dinapoli, R.; Ebner, S.; Ficorella, F.; Fröjj¨dh, E.; Greiffenberg, D.; Hammad Ali, O.; Heymes, J.; Hasanaj, S.; Hinger, V.; King, T.; Kozlowski, P.; Lopez-Cuenca, C.; Mezza, D.; Moustakas, K.; Mozzanica, A.; Paternoster, G.; Ronchin, S.; Ruder, C.; Schmitt, B.; Thattil, D.
• Is Part Of: Journal of instrumentation. Volume 17:Number 11(2022)
• Publication Date: 2022-11-01
• Subjects: Hybrid detectors -- Instrumentation for FEL -- X-ray detectors; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/17/11/C11011
• Languages: English
• ISSNs: 1748-0221

Abstract

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.