General Purpose Small-Angle Neutron Scattering Instrument on HFIR Oak Ridge

Abstract

Within the past year, the High Flux Isotope Reactor (HFIR) has resumed routine operation and service to the scientific user community with a number of significant upgrades. Among the most important of these is a new supercritical hydrogen moderator (T ∼ 20 K) that is the “brightest” cold source currently available. While this will eventually provide neutrons to a whole suite of scattering instruments through four cold-neutron guides (CG1–4), the two flagship instruments, new small-angle neutron-scattering (SANS) instruments on the CG2 and CG3 cold neutron guides, have been installed and commissioned.