Understanding the instrumental profile of synchrotron radiation X-ray powder diffraction beamlines

J Synchrotron Radiat. 2017 May 1;24(Pt 3):622-635. doi: 10.1107/S1600577517005434. Epub 2017 Apr 20.


A Monte Carlo algorithm has been developed to calculate the instrumental profile function of a powder diffraction synchrotron beamline. Realistic models of all optical elements are implemented in a ray-tracing software. The proposed approach and the emerging paradigm have been investigated and verified for several existing X-ray powder diffraction beamlines. The results, which can be extended to further facilities, show a new and general way of assessing the contribution of instrumental broadening to synchrotron radiation data, based on ab initio simulations.

Keywords: instrumental profile function; powder diffraction; ray-tracing; simulation.