Abstract: Oak Ridge National Laboratory is home to two neutron sources, the High Flux Isotope
Reactor (HFIR) and the Spallation Neutron Source (SNS). These facilities supply high-intensity
neutron beams to instruments that are used for a wide variety of research topics including biology,
physics, chemistry, and materials science by researchers from across the globe. The HFIR is
home to two small-angle neutron scattering (SANS) instruments, while the SNS is home to a
SANS instrument and an ultra-small-angle neutron scattering (USANS) instrument. I will
present an overview of the neutron sources, the SANS and USANS instruments, as well as sample
environments and associated supporting facilities. I will also present the on-going
developments related to the Second Target William Heller: Senior Research Scientist, SANS and
Spin Echo Group Leader, Large Scale Structures Section, Neutron Scattering Division, Oak Ridge
National Laboratory Station at SNS and opportunities for SANS instruments there.

Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-
00OR22725 with the US Department of Energy (DOE). The US Government retains and the
publisher, by accepting the article for publication, acknowledges that the US government retains a
nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published
form of this manuscript, or allow others to do so, for US government purposes. DOE will provide
public access to these results of federally sponsored research in accordance with the DOE
Public Access Plan (http://energy.gov/downloads/doe- public-access-plan).

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