view article
Figure 3
Grating efficiency at the zeroth (m = 0, black), first (m = 1, red), second (m = 2, green) and third (m = 3, blue) orders of diffraction for the low- (G1, up), medium- (G2, centre) and high-energy (G3, bottom) gratings over the whole FERMI wavelength range. The intensity used for the measurement of the spectrum is much lower than the total radiation delivered to the users (zeroth order, m = 0, black), which is about 96–98% of the incoming photons. If the harmonic components have enough intensity then it is possible to use the second/third order of diffraction to perform single-shot spectral measurements. The purple dotted lines correspond to the reflectivity of a single mirror with the same coating and incidence angle as the gratings.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 1| January 2016| Pages 35-42
doi:10.1107/S1600577515021116
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