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Neutronic calculations in support of the design of the ITER High Resolution Neutron Spectrometer
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2011 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 86, no 6-8, p. 1277-1281Article in journal (Refereed) Published
Abstract [en]

This paper presents the results of neutronic calculations performed to address important issues related to the optimization of the ITER HRNS (High resolution Neutron Spectrometer) design, in particular concerning the definition of the collimator and the choice of the detector system. The calculations have been carried out using the MCNP5 Monte Carlo code in a full 3-D geometry. The HRNS collimation system has been included in the latest MCNP ITER 40 model (Alite-4). The ITER scenario 2 reference DT plasma fusion neutron source peaked at 14.1 MeV with Gaussian energy distribution has been used. Neutron fluxes and energy spectra (>1 MeV) have been evaluated at different positions along the HRNS collimator and at the detector location. The noise-to-signal ratio (i.e. the ratio of collided to uncoilided neutrons), the breakdown of the collided spectrum into its components, the dependency on the first wall aperture and the gamma-ray spectra at the detector position have also been analyzed. The impact of the results on the design of the HRNS diagnostic system is discussed.

Place, publisher, year, edition, pages
2011. Vol. 86, no 6-8, p. 1277-1281
Keywords [en]
ITER, Neutron, Diagnostic, Spectrometer, Design, Analysis
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-168779DOI: 10.1016/j.fusengdes.2011.02.049ISI: 000297426500188OAI: oai:DiVA.org:uu-168779DiVA, id: diva2:503330
Available from: 2012-02-15 Created: 2012-02-15 Last updated: 2017-12-07Bibliographically approved

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Andersson Sundén, ErikConroy, SeanEricsson, Göran

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