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Figure 2
Calculated on-axis spectral flux in 0.4 mm (V) × 1.8 mm (H) aperture at 27.5 m as a function of X-ray energy delivered by the undulators. The blue curve represents the 17.2 mm-period undulator (currently in use at Sector 30) and the orange curve represents the 30 mm-period undulator (used between 2008 and 2014). The calculations were performed for the APS default lattice 2.51 nm rad, coupling 1.5%, 7.0 GeV and 100 mA. The calculated gain in flux at E = 23.724 keV is a factor of two.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 3| May 2020| Pages 827-835
https://doi.org/10.1107/S1600577520002854
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