University of Limerick
Browse
Proton_Beam_IEEE_Sensors_Jnl_2017.pdf (545.48 kB)

Characterization of a terbium activated gadolinium oxysulfide plastic optical fibre sensor in photons and protons

Download (545.48 kB)
journal contribution
posted on 2018-01-29, 16:39 authored by Crystal Penner, Cornelia Hoehr, Sinéad O'Keeffe, Peter Woulfe, Cheryl Duzenli
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 Čerenkov 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 Čerenkov 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 Čerenkov-only depth-dose curves, signal detection at the extreme distal end of the Bragg peak, and possible sensitivity to neutrons.

History

Publication

IEEE Sensors Journal;18 (4), pp. 1513-1519

Publisher

IEEE Computer Society

Note

peer-reviewed

Rights

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Language

English

Usage metrics

    University of Limerick

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC