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Abstract
The Korea Institute of Geoscience and Mineral Resources (KIGAM) neutron facility, which is based on an electrostatic tandem accelerator, was designed and has been installed for the production of nuclear data for the structure materials of a fusion reactor. The main nuclear reaction for generating neutron beams is the H(p,n)He reaction. This system generates both DC neutron beams and pulsed neutron beams with energies from 1.4 MeV to 2.6 MeV, which are determined by measuring resonance energies for neutron absorption yields on C and Si and comparing these energies with the resonance energies for total neutron cross sections. Neutron fluxes at these energies were about 10 neutrons/sr/sec based on a MeV neutron activation method on Au. The neutron energy spread (full width at tenth maximum: FW1/10M) at a neutron energy of 2.146 MeV is obtained to be about 220 keV, which is determined using measurements of the neutron flight time.
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