The Spallation Neutron Source High Power Target Station Moderator Performance: Calculations and Studies

We address recent progress in the continued neutronic design of the Spallation Neutron Source Target Station as regards moderator performance. The Spallation Neutron Source Target Station will receive 2 MW of 1 GeV protons at 60 Hz. This level of proton power offers unprecedented neutronic performance for pulsed neutron production for time-of-flight neutron scattering, as well as unprecedented challenges in providing such a performance. We report on the results of recent design optimization studies and the importance of carefully matching moderator performance characteristics to the needs of the neutron scattering instruments.