Comparisons between Electromagnetic Theory predictions

Laboratory, Daresbury, Warrington WA44AD, United Kingdom.ABSTRACTComparisons between Electromagnetic Theory predictions and measurements are pre-sented for four types of gratings supporting a very high number of diffracted orders.The first type consists of gold coated gratings used in softX-ray region. The secondone is a multilayer grating designed to have a broad reflection band-around 0.6 nm