Design and Characterisation of an Optical Fibre Dosimeter Based on Silica Optical Fibre and Scintillation Crystal.

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  • Additional Information
    • Source:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101204366 Publication Model: Electronic Cited Medium: Internet ISSN: 1424-8220 (Electronic) Linking ISSN: 14248220 NLM ISO Abbreviation: Sensors (Basel) Subsets: MEDLINE
    • Publication Information:
      Original Publication: Basel, Switzerland : MDPI, c2000-
    • Subject Terms:
      Optical Fibers* ; Radiation Dosimeters*; Physical Phenomena ; Radiometry ; Scintillation Counting ; Silicon Dioxide
    • Abstract:
      In nuclear power plants, particle accelerators, and other nuclear facilities, measuring the level of ionising gamma radiation is critical for the safety and management of the operation and the environment's protection. However, in many cases, it is impossible to monitor ionising radiation directly at the required location continuously. This is typically either due to the lack of space to accommodate the entire dosimeter or in environments with high ionising radiation activity, electromagnetic radiation, and temperature, which significantly shorten electronics' lifetime. To allow for radiation measurement in such scenarios, we designed a fibre optic dosimeter that introduces an optical fibre link to deliver the scintillation radiation between the ionising radiation sensor and the detectors. The sensors can thus be placed in space-constrained and electronically hostile locations. We used silica optical fibres that withstand high radiation doses, high temperatures, and electromagnetic interference. We use a single photon counter and a photomultiplier to detect the transmitted scintillation radiation. We have shown that selected optical fibres, combined with different scintillation materials, are suitable for measuring gamma radiation levels in hundreds of kBq. We present the architecture of the dosimeter and its experimental characterisation with several combinations of optical fibres, detectors, and scintillation crystals.
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    • Grant Information:
      FEKT-S-20-6215 Brno University of Technology; CZ.02.1.01/0.0/0.0/16_026/0008460 Ministry of Education Youth and Sports; CZ.1.05/2.1.00/01.0017 Ministry of Education Youth and Sports
    • Contributed Indexing:
      Keywords: dosimetry; fibre sensors; gamma radiation measurement; ionising radiation detection; silica optical fibres
    • Accession Number:
      7631-86-9 (Silicon Dioxide)
    • Publication Date:
      Date Created: 20221014 Date Completed: 20221017 Latest Revision: 20221019
    • Publication Date:
      20221213
    • Accession Number:
      PMC9572585
    • Accession Number:
      10.3390/s22197312
    • Accession Number:
      36236411