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Figure 5
Undulator spectrum (flux on left y-axis) and multilayer reflectivity (right y-axis) for load case 3 (20.25 keV, undulator K = 2.08 at gap g = 4 mm), multilayer stripe 1 at θ = 0.245°, spectrum on aperture H = 1.28 mm × V = 1 mm at d = 31 m from the source. The multilayer is set to reflect mainly the third undulator harmonic. The diamond window in the frond-end is considered, attenuating the first harmonic. Note that the undulator fundamental falls within the total reflectivity of the multilayer, i.e. low photon energies need to be filtered out.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 5| September 2021| Pages 1423-1436
https://doi.org/10.1107/S160057752100758X
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