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Figure 1
The general focusing scheme in the RDL. S: X-ray point source; Ox,  Oz: coordinate axes; RP: reflecting planes; [\theta]: glancing angle formed by the reflecting planes and the incident beam; α: angle between the reflecting planes and the entrance surface; RL: refractive cylindrical parabolic lens with variables L and [\xi_p] and their directions of increase, parallel and perpendicular to the double-diffracted beam, respectively, and O′ their origin; FP: focal plane perpendicular to the double-diffracted beam; f: focus.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 17| Part 3| March 2010| Pages 332-347
doi:10.1107/S0909049510003754
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