Characterization of a terbium activated gadolinium oxysulfide plastic optical fibre sensor in photons and protons
Penner, C. Hoehr, C. O'Keeffe, S. Woulfe, P. Duzenli, C.
Penner, C.
Hoehr, C.
O'Keeffe, S.
Woulfe, P.
Duzenli, C.
Repository DOI
Publication Date
2017-01-01
Type
Article
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Citation
Penner, C. Hoehr, C.; O'Keeffe, S.; Woulfe, P.; Duzenli, C. (2017). Characterization of a terbium activated gadolinium oxysulfide plastic optical fibre sensor in photons and protons. IEEE Sensors Journal 18 (4), 1513-1519
Abstract
A characterization study was carried out to determine if a novel, millimeter sized Terbium-activated Gadolinium Oxysulfide optical fibre detector has potential for future use in proton dosimetry. Preliminary studies employed a Theratronics Theratron 780C Cobalt-60 unit and were used to determine nominal dose response, field size response and. Cerenkov contributions in 1.25-MeV gamma radiation. More extensive testing was done using 74 MeV-protons produced in the TRIUMF 500-MeV cyclotron facility examining raw Bragg peak, spread out Bragg peak, dose response, and. Cerenkov signal. The detector was low-cost and easily assembled; it showed excellent sensitivity, signal to noise ratio, and reproducibility. Quenching at high linear energy transfer was severe. Additional investigations are needed to further explore Cerenkov-only depth-dose curves, signal detection at the extreme distal end of the Bragg peak, and possible sensitivity to neutrons.
Funder
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Publisher DOI
10.1109/jsen.2017.2780163
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland