Implimentation of a Collimated DT Neutron Beam at the 1st Target Room of JAEA/FNS for New Integral Benchmark Experiments

A new collimator system was constructed to produce a new collimated DT neutron beam for new integral benchmark experiments at the first target room of the Fusion Neutronics Source facility in Japan Atomic Energy Agency. The collimator system had been designed and optimized with a neutron transport calculation code and the performance of the collimated DT neutron beam was tested with an imaging plate, activation foil and a scintillation counter. The DT neutron flux at the exit of the collimator hole was 2.22 × 10^6 cm^(-2)s^(-1), which was 239 times as large as that at the 2 cm off-centered position. It was confirmed that the new DT neutron beam had a good performance as expected. KCI Citation Count: 0