Sporea, D,Mihai, L,Tiseanu, I,Vata, I,McCarthy, D,O'Keeffe, S,Lewis, E

2014

July

Sensors And Actuators A-Physical

Multidisciplinary evaluation of X-ray optical fiber sensors

Published

()

Fiber optics sensors Fluorescent and luminescent materials Spectroscopy Fluorescence and luminescence X-rays X-ray imaging DOSIMETER ACCELERATORS GAMMA

213

79

88

We report the complex evaluation of an extrinsic optical fiber sensor for X-ray detection, consisting of different phosphor materials (ZnS:Ag, Gd2O2S:Pr, Gd2O2S:Eu, Gd2O2S:Tb) optically coupled to the end of a plastic optical fiber. X-ray fluorescence and radioluminescence measurements were used for the evaluation of sensors responsivity. The sensitivity and linearity of sensors response as a function of the X-ray source voltage and current were assessed. The dependence of the sensor responsivity on the irradiation dose rate was measured. X-ray radiography and tomography were employed to investigate the homogeneity of the active material distribution inside the detecting tip. The most sensitive sensor proved to be that based on Gd2O2S:Tb, fixed with the EpoFix glue and manufactured using a plastic cylinder to shape the sensor tip. (C) 2014 Elsevier B.V. All rights reserved.

10.1016/j.sna.2014.03.038