REFSANS. A novel reflectometer for analyses of liquid and soft surfaces at the new research reactor FRM-II in Munich/Germany

Complete text of publication follows. The new reflectometer REFSANS is designed for investigating surfaces and phase boundaries of liquid and soft samples and offers new perspectives for analysing lateral inhomogeneities. A time-of-flight operation modus together with a sophisticated beam guiding system allow for complete analyses without any sample movement. The neutron flux on the sample can be adjusted to the required resolution by means of a multi-disk chopper (2%<Δλ/λ<15%). Off-specular scattering is efficiently detected by means of a large position sensitive area detector (active area about 500 mm x 400 mm) with a high spatial resolution. A novel beam guiding system allows for analysing evanescent small-angle scattering resulting from rather small lateral inhomogeneities. REFSANS is expected to be put into operation at the new research reactor FRM-II in Munich/Germany in 2001. (author)