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Figure 6
Ray-tracing results for the spectrometer configuration in Table 1[link]. The spectral profile distributions at the optimal detector plane for the full wavelength range (2–5 nm) are demonstrated at the lower part of the figure, where the detector needs to scan to cover an area of 2000 mm (meridional) × 20 mm (sagittal). The ray-tracing results for each wavelength of 2 nm, 3 nm, 4 nm and 5 nm are presented in (a)–(d), spanning an identical `detector domain' of 20 mm (vertical) × 0.1 mm (horizontal) for each: the meridional size of the spectrograph is 13–17 µm (FWHM), the sagittal size is about 2.8 mm (FWHM). Then the resolution power at various wavelengths are presented: (a) 91630 at 2 nm, (b) 128800 at 3 nm, (c) 165500 at 4 nm and (d) 196800 at 5 nm.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 4| July 2019| Pages 1058-1068
https://doi.org/10.1107/S1600577519004648
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