| Abstract: | The operation principles, constructions, advantages and shortcomings of the known Time-of-Flight Small-Angle Neutron Scattering (TOF SANS) spectrometers built up on pulsed neutron sources are reviewed. The most important characteristics of TOF SANS apparatuses are rather a high luminosity and the possibility of measurement in an extremely wide range of the scattering vector at a single exposure. This is achieved by simultaneous employment of the white beam, TOF technique for Λ-scan and the commonly known θ-scan. However, the electronic equipment, data-matching programs and the measurement procedure, necessary for accurate normalization of experimental data and their transformation into absolute cross-section scale - they all become more complex as compared with those for SANS apparatuses operating on steady-state neutron sources, where only θ -scan is used. |
