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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.