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Figure 1
Optical parameters of a VLS active grating. [P(\omega,\xi)] is a general point on the grating surface in the ωξ plane. A is the source point and O is the grating centre. OA is the central ray entering the VLS grating. B and B1 are image points of varied energies. r1 and r2 are distances from the grating to the source and the image point, respectively.

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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