view article
Figure 3
Outline of the beam footprint at the grating in coordinates y′–z′, which refer to the grating surface, in the condition presented in Figs. 1[link] and 2[link], when the beam passes an aperture with a square shape and side length of 2.2 mm just upstream of the grating. The figure applies for a grating surface inclination by the blaze angle δ = 29.5° with respect to the vertical direction in the laboratory. The inclinations between the sides of the parallelogram do not vary with the angle of grazing incidence for the incident beam. The unit of the abscissa for the presented outline is mm when a grating with a groove density of 6250 mm−1 is operated at an opening angle of the cone of γ = 31.732 mrad (1.818°). Then according to equation (2)[link] the integer multiples of the fundamental photon energy of 248 eV (wavelength λ = 5 nm), i.e. also 496 eV (m = 2), 744 eV (m = 3), 992 eV (m = 4), are diffracted in the blaze-maximum condition.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 6| November 2020| Pages 1499-1509
https://doi.org/10.1107/S1600577520011194
Follow J. Synchrotron Rad.
Sign up for e-alerts
E-alerts
Follow J. Synchrotron Rad. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS