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Figure 6
Exposure time for a `good' image taken to be an exposure of 108 Gy. The theoretical efficiency of the objective zone plate has been calculated depending on the working energy for Ni (e.g. 833 zones, 100 µm diameter, 210 nm thickness) and Pt (e.g. 833 zones, 100 µm diameter, 450 nm thickness) zone plates, while the detector efficiency is assumed to be 100%. The condenser collecting factor was taken to be 0.44 and its reflectivity 70%.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 16| Part 4| June 2009| Pages 505-512
doi:10.1107/S0909049509019396
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