| ホーム > X-Rays, $\gamma$-Rays, and Proton Beam Monitoring With Multimode Nitrogen-Doped Optical Fiber |
| Published Articles | |
| Title | X-Rays, $\gamma$-Rays, and Proton Beam Monitoring With Multimode Nitrogen-Doped Optical Fiber |
| Author(s) | Girard, S (Lyon U.) ; Di Francesca, D (CERN) ; Morana, A (Lyon U.) ; Hoehr, C (TRIUMF) ; Paillet, P (CEA DAM) ; Duzenli, C (Unlisted, CA) ; Kerboub, N (CERN) ; Reghioua, I (Lyon U.) ; Li Vecchi, G (Lyon U. ; CERN) ; Alessi, A (Lyon U.) ; Duhamel, O (CEA DAM) ; Trinczek, M (TRIUMF) ; Marin, E (Lyon U.) ; Boukenter, A (Lyon U.) ; Ouerdane, Y (Lyon U.) ; Mekki, J (CNES, Toulouse) ; Garcia Alia, R (CERN) ; Kadi, Y (CERN) ; Brugger, M (CERN) |
| Publication | 2019 |
| Number of pages | 6 |
| In: | IEEE Trans. Nucl. Sci. 66 (2019) 306-311 |
| DOI | 10.1109/tns.2018.2879791 |
| Subject category | Nuclear Physics - Experiment |
| Abstract | We investigated the potential of a multimode (50-μm core diameter) nitrogen doped silica-based optical fiber for X-rays, protons, and γ -rays radiation detection and dosimetry. X-rays results confirm that this N-doped fiber presents a strong radioluminescence (RL) around 550 nm when exposed to radiation. The RL observed from a few centimeter long samples linearly depend on the dose rate at least in the 1-mGy/s–50-Gy/s range. Low dose rate γ -ray t ests demonstrate the radiation detection at dose rate as low as 40 μGy/s with a 2-m-long fiber sample. This fiber is also associated with an optically stimulated luminescence (OSL) when exposed to a 1064-nm laser light postirradiation. This OSL signature provides shortly after the irradiation a precise estimation of the accumulated dose at least in the 1-Gy–10-kGy range. Under proton exposure, we benchmarked the performances of the N-doped fiber with the ones of a conventional Markus chamber used by the TRIUMF proton-therapy team. This comparison highlights the potential of the small-size N-doped fiber to partially overcome the known limitations of commercial fiber-based dosimeters for medical applications. The obtained results are very promising for the future design of more complex spatially resolved beam monitoring systems. |
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