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Figure 7
A top view of the cylinder retroflector to explain the error in the sample position measurement. Cr1 (yellow circle) is the ideal position of the cylindrical retroflector, whose radius is parameter R. Cr2 (green circle) is the real position. For the installation error, the distance between Cr1 and Cr2 is expressed as parameter r. Parameter α denotes the angle formed by the X-axis and the line joining the center of Cr1 and Cr2. Parameter β is defined as the angle from the movement direction of Cr2 (white arrow line) and the X-axis. C5 and C9 are the interferometer's sensor head, see also in Fig. 2[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 5| September 2026|
https://doi.org/10.1107/S160057752600634X
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