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Figure 7
Data scan of APD intensity versus time. The motorized slit between the BBB and the APD was set to select a single bright fringe in the interference pattern of the 2.6° lucite wedge. The selected region was about 0.2 mm × 0.2 mm. The voltage supplied to the piezo was ramped up at a constant rate over its full range in 1 h, starting at the beginning of the scan. Each data point was taken over an integration time of 0.4 s. The results are as follows: (a) the APD count rate, (b) the APD count rate normalized to I1, (c) a noiselike region of (b), (d) a region of (b) that shows periodic fringes. The periodic fringes were visible in this scan from 7740 s up to the end.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 11| Part 5| August 2004| Pages 378-385
doi:10.1107/S0909049504015468
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