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Figure 3
Schematic diagram of a sagittal collimating diaboloid. The origin of the coordinate system is taken at the pole of the mirror, with the x axis in the sagittal direction, the y axis in the tangential direction and the z axis normal to the mirror surface. In the yz plane of symmetry, p is the distance from the source point to the mirror pole, qtan represents the distance from the mirror pole to the tangential focus and θ is the angle of incidence on the mirror at the pole.

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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