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Figure 2
Effect of the a2 and a3 coefficients of the VLS expansion on the line profile for the model spectrometer at an illumination of 60 mm, calculated with (a) a2 = a3 = 0; (b) analytical coma-free a2 (dotted line) and numerically optimized a2 (solid), with a3 = 0; (c) numerically optimized a2 and a3. Shown are the bare line profiles (red) and the corresponding Gaussian broadened ones (blue). The profiles are normalized to the maximal amplitude. The optimization of a2 delivers a symmetric profile, and a3 suppresses the symmetric broadening at large illuminations.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 18| Part 2| March 2011| Pages 134-142
https://doi.org/10.1107/S0909049510054452
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