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Figure 4
Calculated flux curves for a 1 mm × 1 mm X-ray beam at 22.3 m from the source. The SCMPW 3.00 T case from Fig. 2[link] has been considered and the calculation steps were 5 µm and 0.1 keV. Emittance effects have been included. The filtration, which is the same for all five cases considered, consisted of: 74 mm He path, 1.8 m air path, 0.35 mm Be window and 38 µm Al foil. The (in vacuo) filtration, which was varied, is as follows: F0, no filters; F2, 0.45 mm graphene, [15\sqrt2] mm HD graphite and [2\sqrt2] mm Al; F4, 0.45 mm graphene, [15\sqrt2] mm HD graphite and [2\sqrt2] mm Cu; F5, 0.45 mm graphene, [15\sqrt2] mm HD graphite, [2\sqrt2] mm Al and [2\sqrt2] mm Mo; F6, 0.45 mm graphene, [15\sqrt2] mm HD graphite, [2\sqrt2] mm Al, [2\sqrt2] mm Mo, plus 4.65 mm Cu (ex vacuo; Gammex 116 HVL attenuator set). See text for further details; in particular Table 3[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 1| January 2017| Pages 110-141
https://doi.org/10.1107/S1600577516015563
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