Description
The numerical convolutions of the appropriate functions for fixed wavelength SANS gives improved Q resolution functions that are slightly flatter in the peak and broader in the tails than the classic Mildner & Carpenter approach. However, in time-of-flight SANS the resolution curves from all the wavelengths contributing to a particular Q value are averaged together, weighted by the number of neutrons detected at each wavelength. Since the resolution width is inversely proportional to wavelength this often gives a curve that is noticeably sharper in the peak and broader in the tails than a simple Gaussian.
In either type of SANS measurement a more detailed description of Q resolution smearing within fitting programs such as SasView will need generic resolution functions of arbitrary shape.
The generic resolution function was subject of discussion at CanSAS workshop in March 2021 and efforts have been for devising data format and using arbitrary function in SasView. The summary of these activities will be provided in the presentation
