Scientific Review: Small Angle Neutron Scattering Research at the HANARO

The HANARO SANS instrument was installed at the cold neutron (CN) beam port in the reactor hall and has been in service since July 2001. It consists of a gamma-ray and fast-neutron filter in a liquid-nitrogen cooled aluminum cryostat containing 20 cm of single-crystal Bi, 20 cm of polycrystalline Be, and a neutron velocity selector covering a wavelength range of 4.0–8.5Å and 10% resolution of dl/l. As a SANS detector, a two-dimensional ³ He-detector with 128 × 128 elements of 5 ×5 mm ² is installed in a vacuum chamber with a variable sample-to-detector distance between 1.5 and 4.5 m. Additionally, the detector chamber can be tilted by 7.5° and the detector can be moved horizontally by 29.4 cm, thus allowing an effective q range of 0.06∼6 nm ⁻¹ .