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Figure 4
Vertical image width as a function of vertical off-axis position for the spectrometer, with parameters given in Fig. 3[link] and Table 1[link]. The plot is for a point source on the sample and for the 5.6 µm FWHM vertical resolution element of the beamline monochromator, the beamline source. With a magnification M = 5.14, the geometric image of the beamline source has 29 µm FWHM. For an illumination bandwidth of 5 eV at 4.5 eV mm−1 dispersion on the sample, the Wolter mirrors must image over a 1.1 mm (FW) field and this can be accomplished with 5 mrad (FW) collection angle. Larger collection angles reduce the available field.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 21| Part 4| June 2014| Pages 736-743
doi:10.1107/S1600577514009692
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