Simulated experiment

The polychromatic beam from the thermal guide H22 is diffracted by the monochromators with a take-off angle of 44.22º towards the sample positions which is 3000mm downbeam.
The sample, a polycrystalline powder, loaded inside a cylinder vanadium can, diffracts the monochromatic incident beam.
The Bragg reflections are mesured by a multi-detector with 1280 cells with a separation of 0.1º, covering the angular range 0.8 to 128.8º. A whole diffraction pattern is thus collected while the detector remains steady.
Note the Radial Oscillating Collimator (ROC) which eliminates the parasitic diffraction beams from sample environment devices.
The recorded neutron diffraction patterns (bottom-left inset) make it possible to study the structure of matter and phase transitions.