A Prototype Scintillating-Fibre Tracker for the Cosmic-Ray Muon Tomography of Legacy Nuclear Waste Containers

Mahon, D.F. et al. (2013) A Prototype Scintillating-Fibre Tracker for the Cosmic-Ray Muon Tomography of Legacy Nuclear Waste Containers. In: 13th Vienna Conference on Instrumentation, Vienna, Austria, 11-15 Feb 2013, pp. 408-411. (doi: 10.1016/j.nima.2013.05.119)

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Cosmic-ray muons are highly penetrative charged particles observed at sea level with a flux of approximately 1 cm−2 min−1. They interact with matter primarily through Coulomb scattering which can be exploited in muon tomography to image objects within industrial nuclear waste containers. A prototype scintillating-fibre detector has been developed for this application, consisting of two tracking modules above and below the volume to be assayed. Each module comprises two orthogonal planes of 2 mm fibres. The modular configuration allows the reconstruction of the initial and scattered muon trajectories which enable the container content, with respect to atomic number Z, to be determined. Fibre signals are read out by Hamamatsu H8500 MAPMTs with two fibres coupled to each pixel via dedicated pairing schemes developed to avoid space point ambiguities and retain the high spatial resolution of the fibres. A likelihood-based image reconstruction algorithm was developed and tested using a GEANT4 simulation of the prototype system. Images reconstructed from this simulation are presented in comparison with experimental results taken with test objects. These results verify the simulation and show discrimination between the low, medium and high-Z materials imaged.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Mahon, Mr David and Murray, Dr Morgan and Hoek, Mr Matthias and Keri, Dr Tibor and McKinnon, Dr Bryan and Clarkson, Mr Anthony and Kaiser, Professor Ralf and Nutbeam-Tuffs, Mrs Sian and Ireland, Professor David and Hamilton, Dr David
Authors: Mahon, D.F., Clarkson, A., Hamilton, D.J., Hoek, M., Ireland, D.G., Johnstone, J.R., Kaiser, R., Keri, T., Lumsden, S., McKinnon, B., Murray, M., Nutbeam-Tuffs, S., Shearer, C., Staines, C., Yang, G., and Zimmerman, C.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
ISSN (Online):1872-9576
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY