Small-angle neutron scattering installation based on time-of-flight method on IBR-2 reactor

Small-angle neutron scattering installation oriented on solving the structural problems of solid state physics, biology, colloid chemistry, physics of polymers, study of materials is described. Its specific properties are as follows: the use of IBR-2 high flux pulsed reactor as a neutron source; the use of time-of-flight method for determining the neutron wavelength; the use of ring-like multiwire 3He neutron detector for counting scattered neutrons. The thermal neutron flux in a sample reduced to project reactor power 4 MW is 6.5x107 nxcm-2xs-1. The range of used neutron wavelengths is 0.7-4 A. The range of transferred wave-vector is 8x10-3-2.0 A-1. The design of small-angle installation, its electronics, software of the control module, experimental data preliminary processing procedures are described. The main properties of resolution function are presented. As an illustration, the scattering data of some solutions are given