Peer-Reviewed Journal Details
Mandatory Fields
Sporea, D,Mihai, L,Vata, I,McCarthy, D,O'Keeffe, S,Lewis, E
2014
February
Sensors
Characterization of Scintillating X-ray Optical Fiber Sensors
Published
()
Optional Fields
fiber optic sensor radiation monitoring in radiotherapy and industry personnel dosimetry radioluminescence X-ray detector X-ray fluorescence X-ray tomography GAMMA-RADIATION BRACHYTHERAPY DOSIMETER PHOTON
14
3445
3457
The paper presents a set of tests carried out in order to evaluate the design characteristics and the operating performance of a set of six X-ray extrinsic optical fiber sensors. The extrinsic sensor we developed is intended to be used as a low energy X-ray detector for monitoring radiation levels in radiotherapy, industrial applications and for personnel dosimetry. The reproducibility of the manufacturing process and the characteristics of the sensors were assessed. The sensors dynamic range, linearity, sensitivity, and reproducibility are evaluated through radioluminescence measurements, X-ray fluorescence and X-ray imaging investigations. Their response to the operating conditions of the excitation source was estimated. The effect of the sensors design and implementation, on the collecting efficiency of the radioluminescence signal was measured. The study indicated that the sensors are efficient only in the first 5 mm of the tip, and that a reflective coating can improve their response. Additional tests were done to investigate the concentricity of the sensors tip against the core of the optical fiber guiding the optical signal. The influence of the active material concentration on the sensor response to X-ray was studied. The tests were carried out by measuring the radioluminescence signal with an optical fiber spectrometer and with a Multi-Pixel Photon Counter.
10.3390/s140203445
Grant Details