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Figure 7
Horizontal acceptance of the three spectrometer designs at 540 eV. Each row corresponds to a particular design, (top) the elliptical cylinder, (middle) the toroid and (bottom) the sagittal collimating diaboloid. The left-hand column shows the images of the beam on the detector for an increasing series of horizontal acceptance. The second column shows the images with the curvature detrended using a second-order polynomial. The third column shows the resultant vertical beam profiles, from which the resolution is determined. The fourth column shows the resulting energy resolution as a function of the horizontal acceptance. The images are offset for clarity. The noise in the resolution plots is due to the finite number of rays used in the ray tracing.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 4| July 2026| Pages 1005-1015
https://doi.org/10.1107/S1600577526005564
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