“…Ray-tracing simulations have been used to evaluate instrumental resolution functions (Vickery et al, 2013;Š aroun & Kulda, 1997Š aroun & Kulda, , 2008 for inelastic neutron spectrometers like VESPA (Fedrigo et al, 2016), SEQUOIA (Granroth & Hahn, 2015) and 4SEASONS (Kajimoto et al, 2018) to name a few. Recently, extension of ray-tracing simulations to particular samples has been used to distinguish between sample physics and subtleties including instrument resolution (Leiner et al, 2019;Hahn et al, 2014) and multiple scattering (Lin et al, 2014;Yiu et al, 2016), for example. Similarly, Monte Carlo ray-tracing studies have been performed to evaluate the instrument design and resolution of TOF powder diffractometers (Lieutenant et al, 2006;Schweika et al, 2016;Š aroun & Beran, 2014) and smallangle scattering instruments (Lieutenant et al, 2005 (Laliena et al, 2020).…”