Use of a correlation chopper for time of flight neutron scattering - Part II : deconvolution in the experimental case

Publisher Website
Google Scholar
Abstract
The deconvolution problem for a correlation chopper in time of flight diffraction experiments has been treated in a previous paper [1] by a matrix formalism. A practical case is now considered since the signal function obtained with a mechanical chopper is not rectangular, but triangular. This observed function Z is deconvoluted by means of either a rectangular inverse sequence (rectangle-triangle deconvolution) or a triangular one (triangle-triangle deconvolution). It is shown that there is a loss of resolution. Perturbations arising from the use of an imperfect mechanical device in elastic scattering, give rise to a negative image of the diffraction function due to variation of the chopper transmission with wavelength. This effect can be corrected a posteriori. The other perturbations give rise to loss of resolution or background modulation

This publication has 0 references indexed in Scilit: