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Figure 1
Cross section in the center of the clessidra lens, in which a large prism is composed of many smaller identical prisms with height h and base width b. The radiation beam travels along the arrows and hits the prism side-walls at an angle of grazing incidence φ.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 15| Part 4| May 2008| Pages 411-413
doi:10.1107/S0909049508013010
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