Abstract
Flux and spectrum calculations for a novel high-intensity, high-energy neutron source recently proposed for fusion materials testing are presented. The usefulness of the source, whose technical feasibility has been demonstrated in a separate journal paper, depends not only on the possibility to produce high neutron fluxes in large test volumes, but also on the possibility of reasonably tailoring fluxes, flux gradients and neutron spectra to irradiation conditions in future fusion reactors. To meet the needs for fusion materials testing, a source concept has been proposed that involves two intense triton beams incident on two separate water-jet targets in facing geometry for irradiation of a common test cell. Small variations of the relative orientation angle, the distance of the two target centres from their common vertex, and the diameter of the incident triton beams, provide good opportunity to modify spatial and spectral neutron distributions in the test cell according to materials testing needs. Calculated flux contours and spatial neutron spectra are presented for a limited range of orientation angles, of distances of the beam centres from the vertex, and of triton beam diameters. Results for the differential flux contours, flux-dependent volumes, and space-dependent neutron spectra are given, and their advantages for special materials testing conditions are discussed.
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Dedicated to Prof. J. Csikai on his 60th birthday
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Cierjacks, S., Hino, Y. Differential flux and spectrum calculations for a novel high-intensity 14-MeV cutoff neutron source based on the1H(t,n)3He source reaction. Acta Physica Hungarica 69, 285–308 (1991). https://doi.org/10.1007/BF03156098
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DOI: https://doi.org/10.1007/BF03156098