Conceptual design of a radial collimator for MIRACLES, the time-of-flight backscattering spectrometer at the European Spallation Source

A parametrized conceptual design for a radial collimator in neutron backscattering instrument is presented, with application to the characteristic geometry of MIRACLES spectrometer, that will be constructed at European Spallation Source (ESS). The analytic development this has considered both forward scattering (sample-analyzer) and (analyzer-detectors) pathways. All dimensions (internal external radii, slit angle) figures merit (such as transmission estimated background reduction) device are calculated function focal points. Finally, performance final concept been validated by Monte Carlo simulations.