The design of a proton recoil telescope for 14 MeV neutron spectrometry |
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Affiliation: | 1. UKAEA, Culham Division, Culham Science Centre Culham, Abingdown, Oxfordshire, OX14 3DB, UK;2. Harwell Instruments Ltd., Harwell Business Centre, Didcot, Oxon OX11 0RA, UK;1. Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching bei München, Germany;2. Conovum GmbH & Co. KG, Nymphenburger Straße 13, D-80335 München, Germany;3. Unlimited Computer Systems GmbH, Seeshaupterstr. 15, D-82393 Iffeldorf, Germany;4. Max Planck Compu ting and Data Facility, Boltzmannstr. 2, D-85748 Garching, Germany;1. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei Anhui, PR China;2. Max Planck Institute for Plasma Physics, EURATOM Association, Wendelsteinstr. 1, 17491 Greifswald, Germany;3. TNO, Stieltjesweg 1, P.O. Box 2600, 2628 CK Delft, The Netherlands;1. Max-Planck-Institute for Plasmaphysics, EURATOM Association, Garching, Germany;2. Institute for Measurement Systems and Sensor Technology, Technische Universität München, Germany;1. Nuclear Physics Institute of the ASCR PRI, Hlavní 130, 250 68 Řež near Prague, Czech Republic;2. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic;3. Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16 Prague 2, Czech Republic;4. Joint Institute for Nuclear Research, Joliot-Curie 6, 141 980 Dubna, Russia;5. Institute for Advanced Studies “OMEGA”, Universitetskaya 19, 141 980 Dubna, Russia |
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Abstract: | As part of the design effort for a 14 MeV neutron spectrometer for the Joint European Torus (JET), computer codes were developed to calculate the response of a proton recoil telescope comprising a proton radiator film mounted in front of a proton detector. The codes were used to optimise the geometrical configuration in terms of efficiency and resolution, bearing in mind the constraints imposed by the proposed application as a JET neutron diagnostic for the Deuterium-Tritium phase. A prototype instrument was built according to the optimised design, and tested with monoenergetic 14 MeV neutrons from the Harwell 500 keV Van de Graaff accelerator. The measured energy resolution and absolute efficiency were found to be in acceptable agreement with the calculations. Based on this work, a multi-radiator production version of the spectrometer has now been constructed and successfully deployed at JET. |
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