  The Fusion Prototypic Neutron Source (FPNS) is considered to be a testbed for
scientific understanding of material degradation in future nuclear fusion
reactors [1-3]. The primary mission of FPNS is to provide a damage rate in iron
samples of 8-11 dpa/calendar year with He/dpa ratio of ~10 appm in irradiation
volume of 50 cm3 or larger with irradiation temperature 300 - 1000o C and flux
gradient less than 20%/cm in the plane of the sample. The Los Alamos Neutron
Science Center (LANSCE) is an attractive candidate for the FPNS project. The
Accelerator Facility was designed and operated for an extended period as a
0.8-MW Meson Factory. The existing setup of the LANSCE accelerator complex can
nearly fulfill requirements of the fusion neutron source station. The primary
function of the upgraded accelerator systems is the safe and reliable delivery
of a 1.25-mA continuous proton beam current at 800-MeV beam energy from the
switchyard to the target assembly to create 1 MW power of proton beam
interacting with a solid tungsten target. The present study describes existing
accelerator setup and further development required to meet the needs of FPNS
project.
