We proposed the neutron spectrum measurement system for Advanced Fusion Neutron Source (A-FNS).It is configured with fission chambers, Self-Powered Neutron Detectors, neutron activation systems using water flow, and activation monitors.In this study, we mainly investigated the multiple activation foils which are sensitive to high energy neutrons.We selected 7-Keto 14 main dosimetry threshold reactions based on specific A-FNS usage conditions.The reactions are as follows: 55Mn(n,2n)54Mn, 59Co(n,p)59Fe, 59Co(n,2n)58Co, 59Co(n,3n)57Co, 75As(n,2n)74As, 89Y(n,2n)88Y, 93Nb(n,2n)92mNb, 169Tm(n,2n)168Tm, 169Tm(n,3n)167Tm, 197Au(n,2n)196Au, 197Au(n,3n)195Au, 209Bi(n,3n)207Bi, 209Bi(n,4n)206Bi, and 209Bi(n,5n)205Bi.
The dosimetry reaction rates were calculated using Toy Tools Monte Carlo code MCNP-5.15 with McDeLicious-11 and nuclear data libraries FENDL-3.1c, IRDFF-1.05 and EAF-2010.As for neutron-induced cross section data of the reactions in the high energy region, we clarified that there were limited experimental data, and proposed new experiment for their evaluations.
Keywords: A-FNS, Neutron spectrum measurement, Activation foil, Dosimetry cross section.