Test of channel-cut perfect crystals for neutron small angle scattering experiments

Channel-cut crystals have been tested to reduce the tails of double crystal rocking curves. Such devices are useful tools for small angle scattering experiments in the Q-range between 10-5 and 10-3 A-1 and for real time experiments at short time scales. Therefore, large objects and large distance interparticle correlations can be investigated advantageously by this method. Test measurements with Latex sphere, polymer blends and lamellar structures have shown the capacity of perfect crystal small angle scattering cameras. The radius of gyration and the characteristic dimension of the lamellar structure have been determined. (orig.)