Speaker
Description
KWS-3 "VerySANS" is a very-small-angle-neutron-scattering diffractometer operated by Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ in Garching, Germany. The principle of this instrument is one-to-one imaging of an entrance aperture onto a 2D position sensitive detector by neutron reflection from a double-focusing toroidal mirror to achieve a high Q-resolution $3·10^{-5}$ Å. In “standard mode” with Q-range between $10^{-4}$ and $2.5·10^{-3}$ Å KWS-3 demonstrates worldwide best performance: intensity much higher than any pinhole SANS instrument and measurement time much shorter than any Bonse-Hart camera. Recently, we have finalized a multi-sample-position instrument concept: we have been able to propose optimal configurations with high flux and low background covering three decades within Q-range $3·10^{-5}$ and $3·10^{-2}$ Å. We can also offer a "SANS" configuration for strongly scattering samples with sample-to-detector distance between 5 and 40 cm covering the Q-range of a classical SANS instrument between $2.5·10^{-3}$ and 0.35 Å. Tilt stages/rotation table for the sample environment (SE) up to 500 kg have been commissioned as a mobile device and could be used across the whole instrument Q-range. Polarized neutrons and a supermirror analyzer represent a novel option now available.
