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Calculations to support JET neutron yield calibration: Neutron scattering in source holder
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2012 (English)In: Fusion engineering and design, ISSN 0920-3796, Vol. 87, no 11, 1846-1852 p.Article in journal (Refereed) Published
Abstract [en]

After the coated CFC wall to ITER-Like Wall (Beryllium/Tungsten/Carbon) transition in 2010-11, confirmation of the neutron yield calibration will be ensured by direct measurements using a calibrated 252Cf neutron source deployed by the in-vessel remote handling boom and Mascot manipulator inside the JET vacuum vessel. The paper describes preliminary calculations and the results of numerical study of the effect of source holder on neutron detector response. The source baton was designed in such a way, that it does not significantly affect the neutron spectrum, angular neutron flux distribution or activation detector response. All effects are approximately equal to or less than 1%. The largest disturbance to the neutron flux angular distribution and to the neutron spectrum arises from the source capsule. Hence one should obtain as much information as possible about the capsule and the 252Cf source material in order to avoid additional systematic errors.

Place, publisher, year, edition, pages
2012. Vol. 87, no 11, 1846-1852 p.
Keyword [en]
JET, MCNP, Neutron yield calibration, Source holder
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-186006DOI: 10.1016/j.fusengdes.2012.08.009ISI: 000311702400007OAI: oai:DiVA.org:uu-186006DiVA: diva2:572691
Available from: 2012-11-28 Created: 2012-11-27 Last updated: 2013-01-10Bibliographically approved

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Conroy, Sean
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