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Development of tailor-made silica fibres for TL dosimetry

Bradley, David, Abdul Sani, SF, Alalawi, AI, Jafari, Shakardokht, Nisbet, Andrew, Noor, NM, Hairul Azhar, AR, Mahdiraji, GA, Tamchek, N, Ghosh, S, Paul, MC, Alzimami, KS and Maah, MJ (2014) Development of tailor-made silica fibres for TL dosimetry Radiation Physics and Chemistry, 104. pp. 3-9.

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Abstract

The Ge dopant in commercially available silica optical fibres gives rise to appreciable thermoluminscence (TL), weight-for-weight offering sensitivity to MV X-rays several times that of the LiF dosimeter TLD100. The response of these fibres to UV radiation, X-rays, electrons, protons, neutrons and alpha particles, with doses from a fraction of 1Gy up to 10kGy, have stimulated further investigation of the magnitude of the TL signal for intrinsic and doped SiO fibres. We represent a consortium effort between Malaysian partners and the University of Surrey, aimed at production of silica fibres with specific TL dosimetry applications, utilizing modified chemical vapour deposition (MCVD) doped silica-glass production and fibre-pulling facilities. The work is informed by defect and dopant concentration and various production dependences including pulling parameters such as temperature, speed and tension; the fibres also provide for spatial resolutions down to <10μm, confronting many limitations faced in use of conventional (TL) dosimetry. Early results are shown for high spatial resolution (~0.1mm) single-core Ge-doped TL sensors, suited to radiotherapy applications. Preliminary results are also shown for undoped flat optical fibres of mm dimensions and Ge-B doped flat optical fibres of sub-mm dimensions, with potential for measurement of doses in medical diagnostic applications. © 2014 Elsevier Ltd.

Item Type: Article
Authors :
NameEmailORCID
Bradley, DavidD.A.Bradley@surrey.ac.ukUNSPECIFIED
Abdul Sani, SFUNSPECIFIEDUNSPECIFIED
Alalawi, AIUNSPECIFIEDUNSPECIFIED
Jafari, Shakardokhtshakardokht.jafari@surrey.ac.ukUNSPECIFIED
Nisbet, AndrewA.Nisbet@surrey.ac.ukUNSPECIFIED
Noor, NMUNSPECIFIEDUNSPECIFIED
Hairul Azhar, ARUNSPECIFIEDUNSPECIFIED
Mahdiraji, GAUNSPECIFIEDUNSPECIFIED
Tamchek, NUNSPECIFIEDUNSPECIFIED
Ghosh, SUNSPECIFIEDUNSPECIFIED
Paul, MCUNSPECIFIEDUNSPECIFIED
Alzimami, KSUNSPECIFIEDUNSPECIFIED
Maah, MJUNSPECIFIEDUNSPECIFIED
Date : November 2014
Identification Number : https://doi.org/10.1016/j.radphyschem.2014.03.042
Depositing User : Symplectic Elements
Date Deposited : 21 Jun 2017 14:40
Last Modified : 03 Jul 2017 08:25
URI: http://epubs.surrey.ac.uk/id/eprint/806047

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