Monochromateur multicouche à bande passante étroite pour le rayonnement X

The principle and the conditions to produce X-ray multilayer Bragg monochromators with a narrow bandwidth are given. This kind of monochromator is obtained by etching periodically a multilayer interferential structure according to a rectangular profile, and by choosing the number of bilayers and the width of the multilayer bars so that the zeroth order diffraction peak has a narrow bandwidth and a peak efficiency close to the multilayer mirror reflectivity