SiO₂-based scintillating-fibres for X-ray detection

Chiodini, Norberto, Brambilla, Gilberto, Vedda, Anna, Di Martino, Daniela, Fasoli, Mauro, Lauria, Alessandro Lauria, Redaelli, Marco and Rosetta, Emanuela (2003) SiO₂-based scintillating-fibres for X-ray detection. Franks, Larry A., Burger, Arnold, James, Ralph B. and Hink, Paul L. (eds.) SPIE 5198 : 48th Annual Meeting: Optical Science and Technology, San Diego, USA. 03 - 08 Aug 2003. pp. 298-305 . (doi:10.1117/12.507715).

Abstract

Scintillating fibres can be utilized as sensors in many fields such as medical diagnosis, industrial monitoring and other scientific areas. The main advantages of optical-fibre radiation-sensors are the remote sensing and the position-sensitive radiation detection. At present, plastic scintillating fibres present limitation for what concerns both luminescence efficiency and durability (radiation hardness). In this work, new rare-earth-doped high-grade silica glasses are synthesized by a modified sol-gel method. These glasses have an efficiency comparable with the state-of-the-art BGO-sensors, high radiation hardness and high compatibility with the silica-based photonic technology. Powder-in-tube and rod-in-tube techniques are used to fabricate low-loss optical fibres with 135, 220, and 660 microns diameter. Device prototypes are obtained by fusion-splicing these fibres to commercial high NA optical fibres.

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Contributors

Author: Gilberto Brambilla

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