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Influence of the Fiber Coating Type on the Strain Response of Proton-Irradiated Fiber Bragg Gratings

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10 Author(s)
Curras, E. ; Instituto de F¿¿sica de Cantabria (CSIC-UC), Santander, Spain ; Virto, A.L. ; Moya, D. ; Vila, I.
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We report on the effect of the fiber coating on the radiation sensitivity of Fiber Bragg Gratings (FBG). For the first time this type of study has been carried out using a 13.5 MeV proton beam up to a fluence of 3.3 \times 10^{15} protons/cm ^{2} (total absorbed dose of 15 MGy). We observed a clear dependence of the radiation sensitivity on the coating, in particular, we have investigated the irradiation induced changes on the strain sensitivity; FBG strain coefficient remains stable for all the fiber within a 5%. This result demonstrates the suitability of FBGs as structural health and deformation monitors in the very hostile environment of the new generation of high-intensity particle physics proton colliders.

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Nuclear Science, IEEE Transactions on  (Volume:59 ,  Issue: 4 )