Possible utilization of high resolution Fourier diffractometer at reactor IBR-2 for strain measurements

In 1992 the new high resolution reverse time-of-flight Fourier diffractometer HRFD was put into operation at the high flux pulsed reactor IBR-2. In parallel with main research program for structural investigations one proposed to perform strain measurements in bulk specimens. To serve the purpose the simplest neutron strain scanner is being designed to have x, y and z vertical movements and rotation about a vertical axis. The collimation system for incoming and outgoing neutron beams allows fixing of the minimum measured volume of 2 x 2 x 2 mm3. The neutron detector is the time-focused scintillation 6 Li-glass assembly at the scattering angle 900. The flight path is about 30 m. The design d-spacing resolution of the scanner at d = 2 A is Δ d/d = 0.0015 and d-spacing range - from 0.5 to 10 A. 7 refs.; 3 figs.; 1 tab