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Figure 1
As the polychromatic X-ray beam penetrates the sample, it creates a Laue image from each subgrain it intercepts. The overlapping Laue images are recorded by an X-ray-sensitive CCD. As a wire passes near the sample, it intercepts rays from the sample. The difference between images before and after a small (differential) move are due to rays that pass either near the leading or trailing edge of the wire. By triangulation, the origins of the rays are determined on a pixel-by-pixel basis.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 2| February 2005| Pages 155-162
doi:10.1107/S0909049504026949
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